1. A workflow monitoring and analysis method, comprising the steps of: generating at least one three-dimensional joint coordinate according to an image information so as to be used for generating at least one workpiece posture information accordingly, and further according to workpiece posture information to generate a task posture information; generating at least one three-dimensional track information according to a movement information so as to be used for generating at least one workpiece track information accordingly, and further according to the workpiece track information to generating a task track information; and generating a task syntagm according to the task posture information and the task track information.