The present invention provides a nano-precision sintering system 1 for sintering a nano-sized powder of a material in the pulse energization and pressure sintering process to obtain a highly purified sintered compact having a nano-sized grain structure, said nano-precision sintering system 1 comprising: at least one pre-process chamber 20 defined by at least one sealed housing 21 having at least one glove and designed to be controlled into a predetermined atmosphere; a sintering process chamber 30 defined by a sealed housing 31 having at least one glove and designed to be controlled into a predetermined atmosphere; a shut-off system 26 disposed in a passage providing communication between the pre-process chamber and the sintering process chamber so as to block the communication between the two chambers selectively while keeping it in an air tight condition; and a pulse energization and pressure sintering machine 50 having a vacuum chamber "C" allowing for the sintering process to be carried out under a vacuum atmosphere, wherein the vacuum chamber is disposed in the sintering process chamber such that the former can be isolated from the latter.