The invention discloses the design of an information collecting and controlling system of an external skeleton assist robot, and relates to the field of robots. The problem of multi-sensor information collecting is mainly solved. Motors for driving and controlling are mounted at joints of the robot respectively in the system. Four kinds of sensors are mounted in the system totally, and the sensors comprise accelerated speed sensors, pressure sensors, rotary encoders and gyroscopes. The pressure sensors are mounted on the main force bearing points of soles, and the accelerated speed sensors are mounted between the thighs and the calves and at hip joints for conducting accelerated speed measuring. The gyroscopes are mounted in the middle behind a waist for measuring the center of gravity and in addition collecting rotary encoder data for calibration. An independent single chip microcomputer is used for collecting data according to distribution of the sensors, a zigbee is used for wireless data transmission, the data are transmitted to an upper computer for being processed, VC++ software is used for displaying the data in real time, and control over the motors is achieved through a CAN bus. Experiments show that the information collecting and controlling system of the external skeleton assist robot can collect effective information in real time and control the information, and important reference value on follow-up study of external skeletons is achieved.