An interactive game system is provided. The interactive game system includes a head-mounted device (HMD), a game suit, a battery and a ground pad. The HMD executes a virtual reality program and displays video information of the virtual reality program to a user. The game suit is worn by the user and connected to the HMD. The game suit includes wireless sensors. The battery provides power to the HMD. The ground pad includes wireless charging devices arranged in a matrix to provide power. When the wireless charging device detects an approaching wireless sensor, the position information of the wireless charging device is transmitted to the approaching wireless sensor and a signal indicating whether the battery needs to be charged is transmitted to the wireless charging device. If the battery needs to be charged, the wireless charging device charges the battery via the approaching wireless sensor.