Method for reading and writing non-standard temporary register in standard interface devices

The invention relates to a method of nonstandard temporary register inside read and write standard interface device. It posits standard order's nonuse parameter as handling parameter; when standard interface device receives the standard order, detest handling parameter reads the corresponding value of nonstandard temporary register and storages it to corresponding output temporary register of standard order's output nonuse parameter so that users can read the value of output temporary register to know the value of nonstandard temporary register.