American President Obama announced that America would expand its protection area in the middle of Pacific Ocean and would form the largest marine reserve in the world. ANBOUND think tank scholars hold that although America expanded its control over Pacific Ocean in the name of protection of nature, it also shows economic and strategic consideration of Obama government. This area has rich natural resources and will provide a solid foundation for the future development of America. America can act freely in the expanded nature reserve without the supervision or impediment of other countries or international organizations, which will contribute to America's control over the whole Pacific Ocean. Whether America will duplicate this method and enhance its control over other sea areas is worth noticing.