A wearable device includes at least one wearable unit, at least one functional module and an identification and storage unit.At least one of the at least one wearable unit includes a plurality of slots arranged at intervals and a backplane communicated with the slots.Each functional module is inserted into the corresponding slot and connected with the backplane to transmit power, control signal or data signal.The identification and storage unit can be detachably installed in one of the at least one wearable unit. The identification and storage unit stores a user's lifetime characteristic data, receives a data generated by the at least one functional module, encrypts the data with the physiological characteristic data as the key, and stores the data in the identification and storage unit.Its functions are easy to expand and change, and provide comprehensive protection for identity and collected data.一種穿戴式裝置，包括至少一穿戴式單元、至少一功能模組以及一識別與儲存單元。該至少一穿戴式單元的至少其中之一包括多個間隔設置的插槽以及一與該些插槽連通的背板。每一該功能模組插入對應的該插槽並與該背板連接以傳送電源、控制信號或資料信號。該識別與儲存單元可拆卸地安裝於該至少一穿戴式單元的其中之一，該識別與儲存單元儲存一用戶之一生理特徵資料，接收該至少一功能模組產生的一資料，並以該生理特徵資料做金鑰加密該資料後儲存於該識別與儲存單元。其功能容易擴展與變化組合，且對於身分識別及收集到的資料提供周延的保護。
