Software project quality management is the important work throughout the entire software life cycle, the effective implementation of software product quality control is an important means of improving software quality and reducing the cost. For the difficulty of quality control, research the control flows and techniques. First, describe the quality control process including prior quality control, matter quality control and afterwards quality control. Then, research the quality control flows through graphs. Finally, by combining graphs and textual descriptions to research quality control techniques, including four commonly used techniques such as cause-effect diagram, Pareto diagram, control chart and run chart. The results show that, through the study of quality control flows and techniques provide techniques and methods to support quality control and improve the science of quality management.