Network equipment risk assessment method

The invention relates to a network equipment risk assessment method, and the method comprises the steps: enabling risk controllability to serve as a third dimension attribute of assessment on the basis of a two-dimensional risk matrix, wherein the risk controllability is used for describing the risk control difficulty; enabling the risk importance to be used for completely describing the risk size, wherein the function relation between the risk importance and the probability, loss and controllability is expressed by a risk function; expressing the risk importance degrees of three attributes through indexes in a risk function expression; and extending the input of the risk matrix to an infinite series from a finite series. The method irons out the defects of a two-dimensional risk matrix during risk assessment, increases the attribute dimensions of risks from a risk control angle, and enables the assessment to be more reasonable. The series of an input variable approaches to infinite, thereby enabling an input