The invention discloses a new remote checking method for transformer substation monitoring system improvement. The method includes steps of A, sending an application to a dispatcher and starting permitted work after obtaining a permission; B, taking safety measures by a maintenance worker and then opening a remote control output circuit; C, selecting testing intervals and determining that operation conditions of a new and a prior background and a main unit meet test conditions; D, the new and the prior background and the dispatcher send remote control execution commands separately; E, the background and main unit testers check the consistence of the remote control commands of the new and the prior system respectively. By adopting the checking method provided by the invention, remote checking time is shortened substantially. Besides, since the downlink is opened, nearly no output is given as long as that the safety measures are taken, so that zero risk is realized.