The invention discloses a building curtain wall safety detection method and system. When the scheme is applied, firstly, the obtained index parameters of the target building curtain wall are analyzedto collect the target parameters, secondly, the first parameter set is screened, the second parameter set is extracted to serve as the reference parameter set, the reference parameter set forms the target sequence unit, the stress distribution information is further obtained, and the label information is found out; and whether the label information changes relative to the index information in thereference information or not is judged, if so, a corresponding potential safety hazard classification table is generated according to the determined potential safety hazard coefficient, further a safety weight value of the target building curtain wall is determined, and finally the safety weight value is compared with a preset safety score weight table and judgment is performed to obtain a safetyscore of the target building curtain wall. And if not, the safety level of the target building curtain wall is judged according to the target weight value. In this way, the safety level of the building curtain wall can be accurately and effectively detected, and then the accuracy of safety judgment of the building curtain wall can be ensured.