Abstract: From the viewpoint of improving automatization to manipulate hydraulic excavator, a new manipulating working device system for hydraulic excavator, which is based on mobile controller of vehicle, was successfully developed, and manual manipulating working device system for hydraulic excavator existed. A test was carried out based on mobile controller of vehicle by programming, the results of test demonstrate that the new manipulating working device system for hydraulic excavator, which is controlled by computer based on mobile controller of vehicle, can perform the same function with manual manipulating working device system for hydraulic excavator system, and the computer controlled manipulating working device system for hydraulic excavator is better realized.