Wall-climbing robots are one type of the specialized robots.They are able to replace human beings in completing various operations on walls.Travel mechanism

which can achieve the flexible movement on walls

is the key portion of the wall-climbing robot.The development of wall-climbing robots at home and abroad are introduced

the research on moving manners and travel mechanisms of various wall-climbing robots are expatiated

and the moving and turning characteristic are analyzed and compared.Finally

the development tendency of travel mechanism was summarized on the basis of the above.