In large equipment state database, the poor management of data versions can cause the system disorder and collapse. To solve the problems, through the analysis and comparison of the existing version control methods, this paper designs a new method which simulates data versions control process by building a colored Petri net. Different colors of tokens show different versions. The forming process of data version is simulated by limiting the firing sequence. Concurrent mechanism of Petri net and SQL server is adopted to solve concurrent and incorporative problems in the process of update. Through the simulation with a real example of substations supervision system, it is concluded that this method can be used in middle and large system and improve the management level of the historical data.