Abstract: One of the most important aspects in improving the numerical model is the reasonable description of radiation-cloud-convection interaction. A more detailed cloud parameterization and radiation parameterization were introduced in a physical conservation fidelity global spectral model, and analysis was based on six 30day numerical integrations of realtime data. Results show that the simulation of cloud and diabatic heating rate between radiation and convection are improved. Furthermore, the baroclinic energy conversions are improved. As a result, the systematic errors have considerable improvements. Temperature error throughout the tropopause and wind error are decreased. Precipitation is dramatically improved both in the amount and the structure. Another advantage is that the false structure of “double Intertropical Convergence Zone (ITCZ)”is not seen in the result.