Monitoring engineering structures is a very important issue for the safety of these structures. Maintaining the safety of engineering structures depends on determining the possible deformations to the structures and taking the necessary precautions in time. In this instance, monitoring the structures became a very important problem. In this study, a prototype of web-based online monitoring system design and implementation was carried out for monitoring the movements of Fatih Sultan Mehmet Bridge which was one of Istanbul's suspended bridges. Raw observations taken by geodetic instruments can be filtered by different filtering techniques and can be analyzed by trend and FFT analysis methods. With the help of these techniques, overall monitoring of the structure was possible. Designed monitoring system can be used on different types of engineering structures such as skyscrapers and dams. With the help of this online monitoring system, project managers or any other officials, in the office, can see the observations in real time and can analyze the results while operators are working near the structure.