The performance of radar's klystron affects directly the quality of radar echoes and operating cost, so the proper use and aintenance of klystrons are paid increasing attention presently. Taking the CINRAD/CC radar at the Dehong Meteorological Bureau as an example, some useful hints in operation and maintenance of radar klystrons are summarized. According to the needs of the operational service, some new indexes and suggestions on the operation, maintenance, and working state control of radar klystrons are presented in combination with working experiences, which may be helpful to the other types of CINRAD radar.