Abstract: Scientificity is one of natures of modern legislation. After investigating the legislative practices of some developed countries, the author finds scientists’ institutionalized participation in lawmaking is very popular in order to achieve legislative scientificity. However, China still has many inadequacies and shortages in this regard. Drawing lessons from legislative experiences of developed countries and based upon national conditions, we should provide systematic supports for scientists’ institutionalized participation in lawmaking, and build regular exchange platforms between sci-tech circle and legislatures.