In order to understand the performance of T63 NWP and the efficiency of its products,the assessments and synoptic verifications are made for main rain-producing systems and circulation in the summer of 1995. The results show that forecasts by T63 model have significant improvements compared with that by T42. The 96-hours、 120-hours、 144-hours and 168-hours predictions by T63 model are considerably reliable for the motion of atmospheric long wave and extra-long wave. The forecast on tendence of large-scale circulation's evolution becomes better. They are considered to be valuable for the medium-range forecast. The forecasts by T63 model are better than that by T42 for the westerly system and subtropical high. It provides useful information for the medium-range forecast.