An unlocking method enabling a locking mechanism to be unlocked, includes the following step of: detecting whether an authentication instruction from a host mobile terminal is received. First, transmitting a location search instruction to a caller mobile terminal when the authentication instruction is received. Next, receiving a location of the caller mobile terminal generated in response to the location search instruction from the caller mobile terminal. Then, determining whether the caller mobile terminal is within a predetermined distance based on the location. Finally, unlocking the locking mechanism when the caller mobile terminal is within the predetermined distance.