Power-assisted manipulators, also known as manipulators, power-assisted arms, etc., are a novel power-saving equipment used for material handling and installation. It cleverly applies the principle of force balance, and realizes "zero operating force" by means of air, so that the heavy objects form a floating state when they are raised or lowered. The operator can push and pull the heavy objects accordingly to move and position them in a balanced manner in the space And put the heavy objects correctly anywhere in the space.