diff --git a/.gitignore b/.gitignore
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--- /dev/null
+++ b/.gitignore
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+venv/
+__pycache__/
+spectrum.csv
diff --git a/README.md b/README.md
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+++ b/README.md
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+# CM700Reader
+
+コニカミノルタ 分光測色計 CM-700d の本体保存データ取得プログラム
+
+### 仕様
+
+- COM ポート自動検索（デバイス名参照）
+- 全ての本体データを取得
+- CSV ファイルに保存
+- 本体データの削除はしない
+
+### 準備
+
+pip install -r requirement.txt
+
+### 設定
+
+config.py に記載
diff --git a/cm700reader.py b/cm700reader.py
new file mode 100644
index 0000000..ccd6697
--- /dev/null
+++ b/cm700reader.py
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+import sys
+
+import numpy as np
+import serial
+import serial.tools.list_ports
+
+import config
+
+
+# デバイス名でCOMポート番号を検索
+def find_port(device_str):
+    """
+    Find the serial port from the device name.
+
+    Parameters
+    ----------
+    device_str : str
+        Device name string.
+
+    Returns
+    -------
+    str
+        Found serial port name or empty string if not found.
+    """
+    ports = list(serial.tools.list_ports.comports())
+    found_list = list(filter(lambda x: device_str in x.description, ports))
+    if len(found_list) == 0:
+        return ""
+    return found_list[0].device
+
+
+# コマンド送受信
+def send_command(ser, command):
+    ser.write((command + "\r\n").encode())
+    data = ser.read(1024)
+    recv_items = [x.strip() for x in data.decode().split(",")]
+    if recv_items[0] != config.CODE_OK:
+        print(f"コマンド{command}に失敗しました")
+        sys.exit()
+    return recv_items
+
+
+# メイン
+if __name__ == "__main__":
+    # COMポートを開く
+    port = find_port(config.DEVICE_NAME)
+    if port == "":
+        print(f"COM port of {config.DEVICE_NAME} not found")
+        sys.exit()
+    ser = serial.Serial(port, config.BAUD_RATE, timeout=config.TIMEOUT)
+    if not ser.is_open:
+        print(f"COMポート{port}を開くことができませんでした")
+        sys.exit()
+    print(f"COMポート{port}が開きました")
+
+    # 基本データ受信
+    recv = send_command(ser, "IDR")
+    wavelen = range(int(recv[5]), int(recv[6]) + 1, int(recv[7]))
+
+    recv = send_command(ser, "STR")
+    num_samples = int(recv[5])
+    print(f"本体にあるサンプル数は{num_samples}個です")
+
+    # 測定データ受信
+    spectrum = []
+    for i in range(num_samples):
+        recv = send_command(ser, f"SDR,{i+1},{config.MEAS_TYPE_DICT[config.MEAS_TYPE]}")
+        spectrum.append(recv[1:])
+        print(".", end="")
+    print("done")
+
+    # COMポートを閉じる
+    ser.close()
+
+    # CSVファイルに保存
+    spetrum_array = np.asarray(spectrum, dtype=np.float32) / 10000.0
+    header_line = ",".join(map(str, wavelen))
+    np.savetxt(
+        config.SAVE_FILE,
+        spetrum_array,
+        delimiter=",",
+        header=header_line,
+        comments="",
+        fmt="%.4f",
+    )
diff --git a/config.py b/config.py
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+++ b/config.py
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+DEVICE_NAME = "CM-700"
+BAUD_RATE = 115200
+TIMEOUT = 1
+CODE_OK = "OK00"
+MEAS_TYPE = "SCE"
+MEAS_TYPE_DICT = {"SCI": 1, "SCE": 2}
+SAVE_FILE = "spectrum.csv"
diff --git a/requirements.txt b/requirements.txt
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index 0000000..f6c1a1f
--- /dev/null
+++ b/requirements.txt
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+pyserial