Research on Human Machine Interface of Palm CNC:Huai Yin Institute of Technology ,Mechnical Engineering Department(Jiangsu Huaian 223003) Abstract: A new type CNC based on Pocket PC(Palm CNC) is proposed. First,system model is built, Design method and system based on .NET Framework are established , Human machine interface and programme building etc. are studied.so system integration for shop floor is available. Key Words:Pocket PC, Palm CNC, Human machine interface, Cooperative Manufacturing.