A medical diagnosis device and a medical system thereof are disclosed. The medical system includes an external diagnosis device and the medical diagnosis device. The medical diagnosis device includes a connection module, a needle shape assembly module, and a micro processing module. The connection module is used for transmitting or receiving a connection signal. The needle shape assembly module is used for detecting a lesion to generate a detecting signal or treating the lesion. The micro processing module is electrically connected to the connection module, and assembled with the needle shape assembly module. The micro processing module is used for receiving the detecting signal detected from the needle shape assembly module and transmitting to the external diagnosis device via the connection module, or let the external diagnosis is able to treat the lesion with the needle shape assembly module.一種醫療診斷裝置及其醫療系統。醫療系統包括外部診斷裝置及醫療診斷裝置。醫療診斷裝置包括連線模組、針狀組裝模組及微處理模組。連線模組用以傳送或接收連線訊號。針狀組裝模組用以偵測病灶以產生偵測訊號或治療病灶。微處理模組係電性連接連線模組，並與針狀組裝模組互相組裝連接，微處理模組用以接收針狀組裝模組所偵測得到之偵測訊號，並經由連線模組以傳輸至外部診斷裝置，或使外部診斷裝置藉由針狀組裝模組以治療該病灶。
