The invention discloses a sending method and apparatus, and an obtaining method and apparatus of lease data based on distributed applications. The sending method includes: a buffer structure with a lease mechanism is established; a registration request of a server is received, the server which satisfies a registration condition is selected as a main server, the lease data in the lease mechanism is sent to the main server, and the main server is authorized to provide data service; and a renewal request of the main server is received, whether the main server satisfies a renewal condition is determined, if yes, the renewal is successful, and the data service is continuously provided; and if not, the renewal is failed, and the step for receiving the registration request of the server is entered. Therefore, according to the method, the execution service function is strong, the server realizes the hot standby function during multi-unit automatic operation, based on low cost and high time efficiency, a standby unit can take over the service in a second level when one server has faults, business loss brought by the single-point problem is reduced, problems of single-point faults and split brain are thoroughly solved, and artificial intervention is not needed in the whole process.