A positioning method adapted for a signal transmitting device and a server is provided. The positioning method includes: transmitting a reference signal by using the signal transmitting device having a low power mode and a high power mode; receiving the reference signal and determining a position of the signal transmitting device according to the reference signal and a signal strength and distance curve diagram by the server; and configuring the signal transmitting device to switch to one of the low power mode or the high power mode by the server.