Abstract: Extending method is developed after some previous methods for conceptual mechanics analysis, such as arousing factor method, major response method and extremely bounding method. The extending analysis process can be stated from a basic model for conceptual mechanics analysis and a series of problems with practical significance in engineering can be treated in the process. Conceptual analyses for two examples, bending moment and deformation analyses for pipes subjected to internal temperature increase and bending moment analyses for multi-stories frames subjected to uniform temperature decrease or floor loads, are performed using the extending process. Beside, extending method can be used in combination with the other basic conceptual analysis methods to surmount analysis difficulties, and further to define the basic response form of a loaded structure.