According to the problem exiqting in the use of Model ZRJ intelligent heatand flow integrating meters,the hardware and the software were improved.The anti-dis-turbance and leak protection circuit,the platinum resistance measuring temperature circuitand the D/A output circuit in the hardware were modified to improve their functions. Asfor the software,the corresponding software completing with electromagnetic flowmeterand orifice meter,and print drive and control system were added,including data voting pro-gram and software self-diagnotqtic program etc,to expand the functions and volume of soft-ware.