Abstract: A non-destructive testing and synthetic evaluation method based on evaluation of the load-carrying capacity for fire damages of concrete structures were proposed. The procedure includes infrared imaging testing, electro-chemistry testing, and temperature field numerical analysis of concrete members, etc. Making use of this procedure, detailed information of the fire damages of concrete structures could be rapidly obtained from the surface to inner. By combining the testing results in situ with theoretical analysis, the evaluation indexes are more actual and rational and the evaluation results became more reliable.