Radiation processing has been a rapidly expanding technology in China since 1970s. About 50 facilities of ,60,Co source with the designed capacity more than 3.7 PBq have been set up in Beijing, Shanghai, and others 36 cities. The total charged activity of sources was more than 862 PBq.More than 26 electron beam （EB） irradiation facilities have been established. The total power of electron beams reached about 926 kW. The effectiveness of the process depends on the proper application of dose and its measurement. The importance of dosimetry events on the processing control of irradiation technology and the quality assurance of irradiated products have been acknowledged in China, which are introduced in this paper.