The role of information security in network accounting is very important, but there is a problem of inaccurate outcome evaluation. The one-way hash encryption algorithm cannot solve the information security problem in network accounting, and the evaluation is unreasonable. Therefore, this paper proposes an AES algorithm for network accounting information security analysis. First, the business operation theory is used to integrate the data, and the indicators are divided according to the information security requirements to reduce network accounting information s security in the interfering factor. Then, the business operation theory is used to form a network accounting scheme and synthesize the AES algorithm analysis results. MBAZ shows that under certain evaluation criteria, the AES algorithm is safe for the accounting information of network accounting the accuracy and time are better than the one-way hash encryption algorithm.