By conducting indoor comparative trial, we studied the impact of the radiant cooling combined with wall-attached-jet system on indoor thermal environment, along with the effect of this combined system on preventing condensation on the ceiling of radiant cooling panel. The result shows that, compared with pure radiant cooling system, those integrated with wall-attached-jet system possess the advantages of a faster cooling speed and a wider cooling magnitude. Meanwhile, considering indoor thermal environment, the composite system has a lower wall temperature, indoor air temperature and humidity. It is concluded that the method of adopting both radiant cooling and wall-attached-jet system simultaneously is more effective in decreasing the dew-point temperature around the radiant cooling panel and protecting the panel from condensation. Moreover, at this time, the refrigeration performance of the radiant cooling panel is greatly enhanced.