The invention discloses an intelligent body fat scale which has a main body which has a MCU unit, a sensor unit, a signal processing unit, a data storage unit and a wireless data transmission unit. The sensor unit acquires weight and body fat data of a user, transmits the acquired information to a signal processing unit, processes the information, and saves the information to the data storage unit. At the same time, the data is transmitted to an intelligent device in wireless transmission. If the sensor unit of the body fat scale, after the user completes scaling, does not detect a signal, the MCU unit determines that the intelligent scale is available, and transmits a command, such that the intelligent scale enters a standby state. When the intelligent scale is at the standby status, the intelligent scale does not display information and only consumes minimum power to enable a CPU to work. When the user stands on the intelligent scale, the sensor of the intelligent scale detects pressure which causes the sensor to deform, and the sensor unit immediately transmits a signal to the signal processing unit. At that time, the MCU unit determines that the intelligent scale is occupied by the user, sends a command, and the MCU unit is awakened and enters the scale awaiting status.