Difference analysis and standardized setting. The evaluation of building bearing capacity should use the theories of differential analysis, standardized setting and standardized folding to form the general idea of evaluation. When considering the ability of construction enterprises to undertake engineering projects, different standard units should be configured according to different types of projects undertaken. Standard units are composed of personnel, equipment and other necessary factors, and the number of standard units owned by a unit at the same time is the decisive criterion for evaluating its construction carrying capacity.