Goodwill achieved, it is a sacrifice of ownership of property at the cost of the security, to protect property transaction in the security system. Goodwill is achieved by the original transfer to the possession of the third person of goodwill, goodwill will normally be the third made the original title. In this case, the owner may request the return of people of goodwill third original. Also known as goodwill achieved immediately. China is now a real estate transaction there are many problems that need to be made use of goodwill to resolve. Many countries in the application of real-estate transaction system made goodwill of the legal requirements China's real estate transaction made in good faith application is necessary. But how practical application of this concept is worth exploring.