[en] The project objectives are to establish the fundamental core technologies for precise auto lesions tracking radiation cancer therapy and developing related system technology as well. Radiation cancer therapy apparatus should be domestically produced to reduce medical expenses, hence advanced technologies are suggested and developed to make cost down medical expenses and save expenditure for importing 10 million dollars/set from overseas. To achieve these targets, we have carried out reviewing of domestic and foreign technology trend. Based on review of state-of-the-art technology, radiation sensory system is studied. 3m high precise image processing technique and intelligent therapy planning software are developed. Also precedent study on the redundant robot for dexterous motion control system has been performed for developing of radiation cancel therapy robot system