As using floor radiant heating is gradually increasing in winter of our country north region, it is importance on residence quality and energy saving .In this paper, analysis of indoor thermal environment and energy consumption of floor radiant heating about normal envelope construction has been carried on. By calculating and simulating perceived temperature the of indoor and the floor surface temperature, it is shown that indoor thermal environment of floor radiant heating and energy consumption are affected by thermal resistance of envelope construction, indoor air temperature for design and floor surface temperature directly, and indicates envelope construction conditions affect most directly interior surface temperature of exterior wall. Heat emission of floor radiant heating room through envelope construction reduces with its thermal resistance increasing. Particularly when the value of resistance is small, so avoid making floor surface temperature very high, which perhaps causes unnecessary energy waste. It provides some theory basis to research indoor thermal environment and energy consumption of residence rationalize for this domestic prevalent heating