Equipment outfield reliability evaluation method and system based on factory and repair data

The invention discloses an equipment outfield reliability evaluation method and system based on factory and repair data. The method comprises the following steps: extracting average working time of each piece of equipment through obtained delivery and repair data of a plurality of pieces of equipment in an external field environment; comparing with a preset minimum average working time threshold value, and screening equipment exceeding the preset minimum average working time threshold value; performing goodness-of-fit test of exponential distribution on the average working time and the fault number of the screened equipment; and under a set confidence coefficient, solving of external field reliability evaluation is carried out. The data source of reliability evaluation is innovated, and the convenience of reliability evaluation is greatly improved. And improvement is made in the aspects of data evaluation of large samples and index distribution goodness of fit judgment before evaluation, so that the scientifi