Based on the sample of Ashare listed companies in Shanghai and Shenzhen from 2009 to 2010, using the database of RLCCW and CSMAR， this paper researches how the board governance and the media coverage influence information disclosure level of corporate social responsibility (CSR). The study finds that unlikenonstateowned enterprises, stateowned enterprises with the expansion of the board and independence ofthe board have a positive influence to CSR Disclosure Index. In stateowned enterprises, holding a concurrent post of board director and Chief Executive Officer (CEO) has a negative impact to CSR Disclosure Index. In nonstateowned enterprises, the more women directors there are, the more CSR Disclosure Index there is. The study also shows that media coverage as a mediator plays an important role between board governance and information disclosure level of CSR.