In order to improve the efficiency and increase the distance of the wireless power transmission system, electromagnetic metamaterials were applied. However, there are many practical problems when metamaterials are placed in the middle of resonant coils when used in wireless charge of electric vehicles, implantable equipment, and high voltage line monitoring. In this paper, two aspects, the coil quality factor and mutual inductance, are discussed to find the gain effect of the electromagnetic metamaterials when placed in the side of receiving coil. The finite element electromagnetic simulation experiment and the physical measurement are used to verify it. It is found that when the electromagnetic metamaterial of planar spiral structure is placed close to the receiving coil, the power of load resistance can be enhanced about 4.9 times. It’s slightly lower than placed in the middle of the coils, but still has a significant gain effect to wireless power transmission system.