Marketing auditing has important influences on marketing business of the power supply company.In order to solve the problems such as the imperfect synergy closed-loop management and the lack of risk assessment system, this paper proposed to establish an entire marketing synergy mechanism and control marketing business risk effectively for deepening the reform of the marketing system.The marketing auditing results of the Xiamen power supply bureau in the year 2016 has shown that the proposed auditing methods are effective for finding and solving problems and conducive to improve the earnings for the company.