It is difficult to analyze the heat transfer character of dry slag discharge system using the theory of computational heat transfer. It is necessary to develop an all-purpose and user-friendly temperature field research platform of dry slag discharge system to decrease difficulty and raise work efficiency. Based on the analysis on work mechanism of dry slag discharge system and the theory of computational heat transfer, this paper uses numerical calculation method to build the model of heat transfer between slags and air, packages the model in dynamic chained library for being called by visualization software, programs numerical simulation visualization software of dry slag discharge system with good interface in VB environment, discusses the procedures of system development and introduces the process of interface creation, procedures control and software integration. Taking dry slag discharge equipment of a power plant for example, numerical calculation and visualization display of heat transfer character is operated to offer more effective research platform for analyzing the heat transfer character of dry slag discharge system and designing equipment in optimization.