The invention relates to a roller-skates electric serviceable tool based on a backpack power supply, which relates to the field of a simple and convenient electric transport tool. The roller-skates electric serviceable tool mainly consists of a backpack which is provided with a charging power supply and a motor control circuit, a pair of roller skates which is fixedly provided with a direct-current motor and a control handle capable of outputting an on-off signal and an analog signal. When the roller-skates electric serviceable tool is in use, the backpack is carried on shoulders by a user, the roller skates are put on feet, and the control handle is held by a hand. The backpack is connected with the roller skates through a power supply wire, and the control handle is connected with the backpack through a data wire; and the backpack can supply power to the motor on the roller skates so as to drive the roller skates to move forwards, and the control handle can transmit different control orders to the motor control circuit on the backpack so as to control a speed, the steering, the brake and the clutch in the traveling process. The roller-skates electric serviceable tool is small in overall space occupation, simple and high efficient to control and is suitable for the fields with dense population, busy traffic and difficulty for other serviceable tools to effectively move.