Information governance and information quality evaluation of smart substation secondary system is an important part of power system. With the development of smart grid, higher requirements are put forward for the information management, quality control and evaluation of substation secondary system. Based on the analysis of the current status of substation information application, this paper analyzes the demand of secondary system governance of smart substation from four aspects: fault information governance, redundant and associated information governance, alarm information governance and information governance evaluation, and finally proposes the establishment of information governance and quality evaluation system to deeply optimize the information environment of smart substation.