The illegal administrative action can be divided in to three catego ries:the action of serious and flagrant breach of law is invalid;

违法行政行为可以被分为三类：“严重、明显”违法的行政行为，无效；

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The ratification of administrative action, which"heals"the flaw of administrative action, is the curing of illegal administrative action.

行政行为追认是对瑕疵行政行为的“治愈”，是对不合法行政行为的矫正。

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The administrative omission is an illegal administrative action compared with administrative behavior. It may also cause damages to administrative counterpart and which should be state compensated.

行政不作为是相对于行政作为而言的一种违法行政行为，行政不作为同样会损害行政相对人的合法权益，进而引发国家赔偿责任问题。

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