The aim of this study is to investigate the efficiency and application of a conversion from Point Cloud-BIM Model to FEM-software and VAR to safety assessment for existing structure. With this information, the engineer can save time, also optimize the workflow and increase the accuracy of model. because engineers know which conversions can be properly executed and which data losses will occur during each conversion when a BIM-model is being transferred. The results did point cloud -BIM application is very useful for geometry investigation of existing building and BIM to FEM can be solve difficulty of creation most complex structure in FEM software.