A system for data synchronization is provided. The system may include a workstation, a user terminal, and a storage device that is accessible to the user terminal and the workstation. The workstation may be configured to generate an identifier relating to a subject. The identifier may point to a data address in the storage device that stores data relating to the subject. The user terminal may be configured to acquire image data of the subject from the data address based on the identifier, receive a user input with respect to the image data of the subject, and update the image data stored in the data address based on the user input.