Characterized by networking, digitization, and intellectualization, the new generation of Information and Communication Technologies (ICTs) has promoted integration of various national economic industries, with a more significant leading role in the socio-economic development. In order to describe the influence of ICT industries on economic growth, this paper has comprehensively analyzed the contribution mechanism of ICTs to current economy. Crucial indicators, such as Total Telecommunications Business (TTB), Data Traffic (DT), and Computing Power Development Index (CPDI), have been innovatively selected to sufficiently describe the data circulation scale and the processing capacity in the era of digital economy. Based on relevant statistics of 31 provinces (municipalities or autonomous regions) in China from 2011 to 2020, quantitative results have been put forward to interpret the impact of ICT industries on the national economy development by using correlation coefficient analysis and data regression analysis methods. The measurement results show that TTB, DT, and CPDI are positively correlated with the national economic development, indicating that each 1% increasement of TTB, DT, and CPDI increases Gross Domestic Product (GDP) by 0.08%, 0.09%, and 0.6%, respectively.