The present application discloses a location based task management method. A computational device obtains first location information concerning one or more geographical locations where a first client device has been located, and assigns a task to the first client device based on the one or more geographical locations. The task includes a task performance location. The computational device then receives from the first client device a first message that includes second location information corresponding to the task performance location and at least one additional information item. The at least one additional information item is captured by first client device at or near the task performance location after completing the task. The progress of the task is then managed based on the second location information, the at least one additional information item and a time difference between the assignment of the task and the receipt of the first message.