This article focuses on the demand side perspective and uses the value chain decomposition method to track the implicit carbon flow composition and path of China's regional information and communication technology industry (ICT industry), and further identify the pollution shelter effect of ICT industry at the regional level The results indicate that the implicit carbon emissions and added value of the ICT industry caused by cross regional trade-related activities dominate, and the shorter the ICT industry production chain in the domestic value chain, the higher the carbon productivity From the perspective of demand categories, the vast majority of domestic provinces mainly generate ICT carbon emissions through local demand (without cross regional trade activities), while foreign regions are mainly caused by cross-border trade activities of final products; The development needs of ICT itself have led to the highest carbon emissions, followed by the construction industry; Fixed capital formation is the largest demand type that leads to implicit carbon emissions in ICT, followed by exports With the increase of cross regional activities, the implicit carbon emissions caused by demand side in the ICT industry have shown a decreasing trend At different stages of the value chain, the role of pollution shelters in each province is heterogeneous, and there are significant differences in their roles when facing different demand areas Based on this, we need to draw an implicit carbon map of the ICT value chain from the demand side, strengthen regional collaborative carbon governance, promote innovative breakthroughs and applications of green and low-carbon technologies in the ICT industry, improve the carbon emission accounting and monitoring system of the ICT industry, and take measures to promote the green and low-carbon development of the ICT industry.