With the increasing development and perfection of the social economy and information technology, the information industry focusing on the Internet is becoming more and more powerful whose superior and excellent services have had a great impact on and penetrated deep into every field of the whole society. It is inevitable for the enterprises’ financial information system and the Internet to combine with each other, with the enterprises’ financial information system serving as one of the most important parts to drive the economic society to move on. As far as the safety to the financial information system based on the network is concerned, there are still some hidden risks because of the limits of the technology and the existing operating danger during the abovementioned process. In terms of the content about the network finance, the importance about the safety to the financial information system is first analyzed in this paper. Then the existing risks to the current system are pointed out with the specific examples probed and studied. Finally some safe and precautionary measures to the financial information system are specifically put forward.