Internet as the representative of technological development has created a huge virtual economic world resulting in a lot of economic transactions that are difficult to calculate or evaluate by traditional economic statistical method. Eventually, a large-scale "public science and technology welfare" is created in the macroeconomic system. The public science and technology welfare of the global community will be an important part of social welfare system. Judging from the current development, it will be increasingly important in the future and even determines the status and responsibility of future government. Government will play an important and irreplaceable role in the allocation of public science and technology welfare in the future.