Method and device for detecting deformation and defects of existing building

The invention discloses a method and a device for detecting the deformation and defects of an existing building, and belongs to a detection technology for the deformation and defects of an existing building. The deformation and defect detection of the existing building is high in cost and great in detection result difference. According to the method and the device, permanent image pick-up equipment is arranged on the site of the existing building to acquire a real-time image of a detected position of the building, the real-time image is transmitted to terminal equipment for comparison and measurement, and the deformation is finally calculated, so that fatigue of workers can be relieved, the expenditure can be reduced, the working efficiency can also be improved, and particularly, the state of the building can be monitored in real time and mastered in time; because the data for comparison and measurement can be stored for a long term, the data can be checked to avoid falsification; and the comparison, measurement and calculation can be implemented by means of the terminal equipment, so that different detection results caused by different people can be avoided.