| Because of the rapid urbanization in our country, many big cities faced to the problems such as traffic and lack of land, the construction of subway became the best way to solve those problems. At the same time, the construction of subway laded to large-scale development of underground space. But the construction of underground space was not lasted very long in our country, and there weren't complete law system of the development of the underground space, especially there weren't any laws or market rules about the transaction of underground land of the subway station, those ware very bad for the development of the underground space. In order to use the underground space of the subway station more effective, the problems of the right and the cost estimating of the underground space in the market transactions must be discussed.Base on the definition of the subway station of underground space, the analysis of the theory and the legal right about underground space, this paper proposed that when the underground space of subway station was developed, the main right which involved was the land use right and only that was the main right which should be transact. Then solutions of the problems which might happen in the primary land market and the secondary land market were arisen. The comprehensive legal system of the underground space of subway station ensured the rights and obligations during the development processes.As the need of the cost estimating of the underground land, this paper introduced a valuation method of the underground land which suit for China's specific national conditions. The method which introduced in this paper was proposed under the support of the legal right of the underground space, the analysis of evaluation methods which were usually used at home and abroad, and based on the principle of opportunity cost. The method of the underground land cost estimating was in accordance with the following steps, the first step of the underground land cost estimating method was to analysis the main factors of the underground land price, the second step was to determine the utilization of underground space in subway station, and the third step was to determine the price of the underground land in the subway station. In addition, this paper proposed the evaluation order which should be obeyed when the underground land was calculated and what should be noticed when we use the method in the reality operation.Finally, the feasibility of the evaluation method which proposed in this paper was proved by the actual case of the underground land price calculation of the Hongshan Square station in the Wuhan subway. |