In this paper, through the establishment of a vector model to confirm the relationship between electronic money and virtual economy, through the vector model we can see that the electronic money and virtual economy is proportional to. In addition, according to the model, we can see that the virtual economy will fluctuate greatly in the short term. Although there is a negative correction relationship between electronic money and virtual economy, there is a positive promotion relationship between electronic money and money supply. Under their joint action, when the fluctuation deviates from the short-term, the system will adjust automatically, making the fluctuation of the virtual economy more violent.