A wearable electronic device includes a signal capturing assembly and a wearable assembly. The signal capturing assembly is configured for detecting and processing vital signs from a user and defines at least one port. The signal capturing assembly includes a base, a first cover, a second cover, a third cover, a first electrode, and a core module. The first, second, third covers cover the base to form a receiving chamber to accommodate the core module. The first electrode is extended through the base and electronically connected to the core module The wearable assembly is detachably connected to the signal capturing assembly through the at least one port.
