SGCC was established on December 29,  2002, an enterprise approved by the State Council to carry out state-authorized investment and a pilot state holding company. It has been rated as an A-Class enterprise by SASAC evaluation on operation performances for 11 consecutive years. As the largest utility in the world, SGCC has a stable ranking of the 2nd on Fortune Global 500.

SGCC constructs and operates power grids as its core business. As a super-large state-owned enterprise crucial to national energy security and economic lifeline, with a mission to provide safer, cleaner, and more economical and sustainable power supply. SGCC operates as a group with RMB 536.3 billion registered capital and 1.72 million employees. SGCC provides power to over 1.1 billion people in 26 provinces, autonomous regions and municipalities, covering 88% of the national territory. The company also owns and operates overseas assets in the Philippines, Brazil, Portugal, Australia and Italy, etc. with good performance.