Abstract
Hydraulic excavators are used for civil working such as digging, loading of the earth and sand mainly till now. But with changing into the direction toward the recycling society, the hydraulic excavators spreads a place of the activity to the recycling object work to increase rapidly such a building demolition work and the iron and steel clipping processing. This development targets the demolition work of a building increasing around an urban region recently. We researched working analysis and picked up the function for the working and found out the size of the most suitable machine. We report about the result of findings, furthermore the system architecture and operation system that we examined.
