The invention relates to an information security electric power semi-object simulation platform construction method and an information security electric power semi-object simulation platform construction system. The method comprises the following steps: on a first simulation host computer, constructing a wide area network communication system through a simulation software; respectively deploying corresponding remote terminal units on power generation stations, power transmission stations, power transformation stations, power distribution stations, power consumption stations and scheduling center stations of an electric power system, moreover, enabling the remote terminal units to build a communication connection with the wide area communication system; and deploying a second simulation host computer, taking the second simulation host computer as an information security data center, and enabling the information security data center to build communication connections with both the wide area network communication system and the remote terminal unit. With the method and the system provided by the invention, all-around collection for data of operation can be executed, and data support is provided for research on a problem of information security protection of an electric power industrial control system.