Abstract: Evaluating the vulnerability of existing buildings is in fact a prediction of damage against possible earthquakes. In this regard, the existing building structures vulnerability prediction of possible future earthquakes is one of the most pressing engineering measures due to provide solutions for seismic risk reduction in urban areas. Various constructions with concrete structure in Bandar Abbas which lack the appropriate lateral force resisting systems added to the low quality of implementation, inappropriate quality of building materials and environmental conditions have caused the vulnerability of buildings against earthquakes. Consequently, recognizing structural weaknesses and evaluating them against earthquakes is of great importance for the building’s improvement. This study aims to achieve the recognition of the existing state office buildings in Bandar Abbas from the perspective of seismic resistance and seeks to assess the quantitative and qualitative vulnerability of two office buildings using different indices of damages and tries to answer the question whether the implemented concrete structure of the office buildings in Bandar Abbas have a good performance against earthquake or not. Accordingly, technical specifications and implementation plans for the two office buildings were collected including administrative plans, executive details and laboratory sheets and then the vulnerability of buildings were assessed by the modeling in Etabs and Sap 2000 Software using non-linear analysis (static and dynamic) and using qualitative evaluation methods of Aria, Canada by laws and ATC-21 as well as a quantitative assessment methods of Raphael-Mir, Suzan, Newmark and Rosen Blow. The results showed that from the 848 proposed joints in the public library building in Bandar Abbas, 24 joints are on the verge of Collapse (CP) and 14 joints are in the range of Life Safety (LS). In civil status registration organization building in Bandar Abbas, there are 236 proposed joint in the total structure of the building among which 11 jointsare on the verge of Collapse (CP) and 3 jointsare in the range of Life Safety (LS). The results of the vulnerability of buildings using Raphael-Mir, Suzan, Newmark and Rosen Blow index show that the public library building in Bandar Abbas in these methods (the design-based earthquake in the general bylaws of buildings against earthquake) will be totally damaged and civil status registration organization building will also be totally and generally damaged in these methods in the life safety and general vulnerability.