The invention discloses a shared memory type multiprocessor system, which comprises more than 2 processors, a memory and a bus/on-chip network. One end of the bus/on-chip network is connected with each processor, and the other end of the bus/on-chip network is connected with the memory; a transaction read-write cache and a transaction property cache are internally arranged in each processor respectively; and each processor is internally provided with a processor local cache corresponding to each processer. The invention also discloses a realizing method of a transaction storage access mechanism based on exception handling by utilizing the shared memory type multiprocessor system; and 5 types of exception mechanisms are provided, including a transaction initial exception mechanism, a transaction full exception mechanism, a transaction read-write exception mechanism, a transaction submitting exception mechanism and a transaction restarting exception mechanism respectively. The inventionis used for solving the problem of cache overflow during solving transaction memory realization.