Abstract: A smartphone capable of replacing a meter of an electronic exercise machine includes a main body, a communication interface, a central processing unit (CPU), and a storage unit. A second man-machine interface and the communication interface are disposed on the main body, in which the communication interface is corresponding to an output terminal of a first man-machine interface of an electronic exercise machine. The CPU is disposed in the main body and is electrically connected to the communication interface. Being driven by an interface application software of the electronic exercise machine, the CPU may correspondingly control the electronic exercise machine, and an operation panel is formed on the second man-machine interface. The storage unit is disposed in the main body and is electrically connected to the CPU. The interface application software corresponding to at least one model of the electronic exercise machine is stored in the storage unit.