To solve the problem of huge data and analysis paralysis in bridge state assessment,the Five Indices Method is used to analyze the superstructure components of a cable-stayed bridge according to monitored data. Then, a comprehensive evaluation index incorporating weight coefficients is proposed to evaluate the safety condition of the cable-stayed bridge superstructure based on the existing five indices. After that, to overcome the calculation difficulty in bridge evaluation activities, a series of 3A indicators are proposed and individually termed as the amplitude offset, the abnormal degree and the average value fluctuation. Compared with the previous five indices, the three new indicators require less computation, and thus, are more convenient for engineers to conduct on-site evaluation. The 3A indicators are used to evaluate the safety condition of the cable-stayed bridge, and the results are compared with the five indices.The analysis results show that the superstructure state of the cable-stayed bridge evaluated by the 3A indicators is basically consistent with the five indices.