Canceling litigation is characterized by subjective lawsuit, forming lawsuit and protesting lawsuit which decide that it can only applies to specific administrative acts aiming for some legal effects, especially those should be cancelled because there is some legal defects. However, based on the effective remedy, it should temporarily be open to those invalid administrative acts, but not to the act that just refusing the people’s application. The administrative procedure law should be established as soon as possibly the way of development by stereotype, and on this basis, through specify the characteristics of canceling litigation and other types of litigation, redefining the object of canceling litigation.