Electric tool and electric tool control method

The invention relates to an electric tool and electric tool control method. The electric tool consists of a working head, a motor which drives working head to output power, a power supply which provides power for motor, detecting elements which detect the parameter for load of characterization working head and output detection signal, a control module which receives detection signal and controls working head discontinuously output power depending on detection signal to judge the decrease of load for working head. The electric tools, with the situation which the load of working head decreases during the installation process, detecting element can detect the parameter for load of characterization working head changed for the changing of the installing condition of screw, and then output detection signal to control module. Control module discontinuously outputs power depending on the detect sent by detecting element, thereby achieving the goal that monitors screw slip or working head jumps out recessed groove of screw head, changes the working condition of the electric tool and improves the working efficiency in installing screws.