The real estate license is to protect the legitimate rights and interests of the owner of the house, which means that the owner has the right to possess, use, benefit and dispose of his property according to law. This right will take effect only after the obligee has registered the property right with the government real estate management authority and obtained the house property right certificate, which is protected by the state law. To maintain the order of the real estate market, the essence of real estate transaction is the valuable transfer of real estate property rights. Real estate market behavior is based on clear property rights. Whether it is real estate transaction, exchange, lease, mortgage, or asset reorganization and investment attraction caused by modern economic development, clear property rights relations and legal property rights certificates are needed as protection.