A control system for vehicle hiring includes a control device and a wireless smart key. The control device includes a first microprogram control unit. The wireless smart key includes a second microprogram control unit, a positive electrode and a negative electrode both electronically coupled to the second microprogram control unit. When the first microprogram control unit receives a first sensing signal or a second sensing signal, the first microprogram control unit is electronically coupled to the positive electrode and the negative electrode.