diff --git a/configuration.nix b/configuration.nix
new file mode 100755
index 0000000..fac8fe5
--- /dev/null
+++ b/configuration.nix
@@ -0,0 +1,165 @@
+# Edit this configuration file to define what should be installed on
+# your system.  Help is available in the configuration.nix(5) man page
+# and in the NixOS manual (accessible by running ‘nixos-help’).
+
+{ config, pkgs, ... }:
+
+{
+  imports =
+    [ # Include the results of the hardware scan.
+      ./hardware-configuration.nix
+    ];
+
+  nix.settings.experimental-features = [ "nix-command" "flakes" ];
+
+  programs.nix-ld.enable = true;
+
+  # Bootloader.
+  boot.loader.grub.enable = true;
+  boot.loader.grub.device = "/dev/sda";
+  boot.loader.grub.useOSProber = true;
+
+  networking.hostName = "Felix-Desktop"; # Define your hostname.
+
+  # Enable networking
+  networking.networkmanager.enable = true;
+
+  # Set your time zone.
+  time.timeZone = "Europe/Berlin";
+
+  # Select internationalisation properties.
+  i18n.defaultLocale = "en_US.UTF-8";
+
+  i18n.extraLocaleSettings = {
+    LC_ADDRESS = "de_DE.UTF-8";
+    LC_IDENTIFICATION = "de_DE.UTF-8";
+    LC_MEASUREMENT = "de_DE.UTF-8";
+    LC_MONETARY = "de_DE.UTF-8";
+    LC_NAME = "de_DE.UTF-8";
+    LC_NUMERIC = "de_DE.UTF-8";
+    LC_PAPER = "de_DE.UTF-8";
+    LC_TELEPHONE = "de_DE.UTF-8";
+    LC_TIME = "de_DE.UTF-8";
+  };
+
+  services.xserver = {
+    enable = true;
+    xkb = {
+      layout = "de";
+      variant = "";
+    };
+  };
+
+  # Enable the KDE Plasma Desktop Environment.
+  services.displayManager.sddm.enable = true;
+  services.desktopManager.plasma6.enable = true;
+
+
+  services.xrdp = {
+    defaultWindowManager = "startplasma-x11";
+    enable = true;
+    openFirewall = true;
+  };
+
+  # Configure console keymap
+  console.keyMap = "de";
+
+  # Enable CUPS to print documents.
+  services.printing.enable = true;
+
+  # Enable sound with pipewire.
+  services.pulseaudio.enable = false;
+  security.rtkit.enable = true;
+  services.pipewire = {
+    enable = true;
+    alsa.enable = true;
+    alsa.support32Bit = true;
+    pulse.enable = true;
+  };
+
+  programs.zsh.enable = true;
+  users.users.felix = {
+    isNormalUser = true;
+    description = "Felix";
+    extraGroups = [ "networkmanager" "wheel" ];
+    packages = with pkgs.kdePackages; [
+      kate
+      kcalc
+      partitionmanager
+      kmail
+    ];
+    shell = pkgs.zsh;
+    openssh.authorizedKeys.keys = [
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIkbAVXWPpN7jAJrf/1h8QHNW3LMQ0LaMTl8gnVzufPV fheitmann@fheitmann-flip"
+    ];
+  };
+
+
+  # Install firefox.
+  programs.firefox.enable = true;
+
+  # Allow unfree packages
+  nixpkgs.config.allowUnfree = true;
+
+  # List packages installed in system profile. To search, run:
+  # $ nix search wget
+  environment.systemPackages = with pkgs; [
+    rustdesk-flutter
+    wget
+    ncdu
+    eza
+    zsh
+    jq
+    iperf3
+    dnsutils
+    file
+    which
+    tree
+    gawk
+    zstd
+    gnupg
+    btop
+    iotop
+    iftop
+    lm_sensors
+    ethtool
+    pciutils
+    usbutils
+    neofetch
+    zip
+    xz
+    unzip
+  ];
+
+  # Some programs need SUID wrappers, can be configured further or are
+  # started in user sessions.
+  # programs.mtr.enable = true;
+  # programs.gnupg.agent = {
+  #   enable = true;
+  #   enableSSHSupport = true;
+  # };
+
+  # List services that you want to enable:
+
+  # Enable the OpenSSH daemon.
+  services.openssh = {
+    enable = true;
+    settings.PasswordAuthentication = false;
+    settings.KbdInteractiveAuthentication = false;
+  };
+
+  # Open ports in the firewall.
+  # networking.firewall.allowedTCPPorts = [ ... ];
+  # networking.firewall.allowedUDPPorts = [ ... ];
+  # Or disable the firewall altogether.
+  # networking.firewall.enable = false;
+
+  # This value determines the NixOS release from which the default
+  # settings for stateful data, like file locations and database versions
+  # on your system were taken. It‘s perfectly fine and recommended to leave
+  # this value at the release version of the first install of this system.
+  # Before changing this value read the documentation for this option
+  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+  system.stateVersion = "25.05"; # Did you read the comment?
+
+}
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..417de1c
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,49 @@
+{
+  "nodes": {
+    "home-manager": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1751810233,
+        "narHash": "sha256-kllkNbIqQi3VplgTMeGzuh1t8Gk8TauvkTRt93Km+tQ=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "9b0873b46c9f9e4b7aa01eb634952c206af53068",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "ref": "release-25.05",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1751582995,
+        "narHash": "sha256-u7ubvtxdTnFPpV27AHpgoKn7qHuE7sgWgza/1oj5nzA=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "7a732ed41ca0dd64b4b71b563ab9805a80a7d693",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-25.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "home-manager": "home-manager",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100755
index 0000000..c0004d4
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,28 @@
+{
+  description = "Felix' first NixOS System Flake";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
+    home-manager = {
+      url = "github:nix-community/home-manager/release-25.05";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, home-manager, ... }@inputs: {
+    nixosConfigurations = {
+      Felix-Desktop = nixpkgs.lib.nixosSystem {
+        system = "x86_64-linux";
+        modules = [
+          ./configuration.nix
+
+          home-manager.nixosModules.home-manager {
+            home-manager.useGlobalPkgs = true;
+            home-manager.useUserPackages = true;
+            home-manager.users.felix = import ./home.nix;
+          }
+        ];
+      };
+    };
+  };
+}
\ No newline at end of file
diff --git a/hardware-configuration.nix b/hardware-configuration.nix
new file mode 100644
index 0000000..37c1f08
--- /dev/null
+++ b/hardware-configuration.nix
@@ -0,0 +1,31 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/profiles/qemu-guest.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "ata_piix" "uhci_hcd" "virtio_pci" "virtio_scsi" "sd_mod" "sr_mod" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/1c22fc0b-9b19-4509-a695-2be590eb71f8";
+      fsType = "ext4";
+    };
+
+  swapDevices = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.ens18.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}
diff --git a/home.nix b/home.nix
new file mode 100755
index 0000000..e127dae
--- /dev/null
+++ b/home.nix
@@ -0,0 +1,74 @@
+{ config, lib, pkgs, ... }:
+
+{
+  home.username = "felix";
+  home.homeDirectory = "/home/felix";
+
+  # encode the file content in nix configuration file directly
+  # home.file.".xxx".text = ''
+  #     xxx
+  # '';
+
+  home.packages = with pkgs; [
+    # nix related
+    nix-output-monitor
+  ];
+
+  # basic configuration of git, please change to your own
+  programs.git = {
+    enable = true;
+    userName = "Ryan Yin";
+    userEmail = "xiaoyin_c@qq.com";
+  };
+
+  # starship - an customizable prompt for any shell
+  programs.starship = {
+    enable = true;
+    # custom settings
+    settings = {
+      add_newline = false;
+      aws.disabled = true;
+      gcloud.disabled = true;
+      line_break.disabled = true;
+    };
+  };
+
+  programs.alacritty = {
+    enable = true;
+    settings = {
+      env.TERM = "xterm-256color";
+      font = {
+        size = 12;
+        draw_bold_text_with_bright_colors = true;
+      };
+      scrolling.multiplier = 5;
+      selection.save_to_clipboard = true;
+    };
+  };
+
+  programs.zsh = {
+    enable = true;
+    enableCompletion = true;
+    autosuggestion.enable = true;
+    syntaxHighlighting.enable = true;
+    shellAliases = {
+      ls = "exa -lh";
+      ll = "ls -a";
+      update = "sudo nixos-rebuild switch";
+    };
+    initContent = lib.mkOrder 1500 ''
+      # source "~/.config/ssh-find-agend.sh"
+      emulate ksh -c "source ~/.config/ssh-find-agent.sh"
+      ssh-add -l >&/dev/null || ssh-find-agent -a || eval $(ssh-agent) > /dev/null
+    '';
+
+    history.size = 10000;
+    oh-my-zsh = {
+      enable = true;
+      plugins = [ "git" ];
+      theme = "robbyrussell";
+    };
+  };
+
+  home.stateVersion = "25.05";
+}
\ No newline at end of file