A biological signal collection method, apparatus, and system (800) and an electronic device (100) are provided. The biological signal collection method includes: obtaining output data of at least one motion sensor (S210) controlling collection duration of at least one biological signal of a user according to at least the output data of the at least one motion sensor (S220) and collecting the at least one biological signal of the user in the collection duration of the at least one biological signal (S230). According to the biological signal collection method, apparatus, and system (800) and the electronic device (100), biological signal collection duration can be properly controlled, and biological signal measurement precision can be improved.
