In the process of the formation of new quality productive forces, four technologies play crucial roles. Information technology is the innovation-leading technology. New industrialization technology is the foundation-building technology.Financial technology is the efficiency-enhancing technology. Green technology is the quality-oriented technology. At present, the information revolution has developed to the stage of qualitative change, where data has become a new factor of production, and the production of knowledge and information has entered the stage of mechanized large-scale industry from manual workshops. The proposal of new quality productive forces is a scientific observation and summary of the progress of the information revolution to the stage of qualitative change. Through the analysis of the key technologies of new quality productive forces, the implication of “new” and “quality” in the phrase of new quality productive forces can be understood more clearly.