Abstract: Social selection appears more commoner in the process of technological evolution than natural selection. Compared with social group selection, the individual selection of inventor is equally important. Inventor's choices realize the formation of expressive new technical genes, and influence the progress of technology evolution. The choices are affected by inventor's aim and criterion. Their own capability and the social environment also play important roles. To improve the overall national technological level, we must attach importance to inventor. We should begin from building the entire environment for inventors to provide effective spaces for their innovations.