ObjectiveTo study the effect of quality control circle activities on reducing the risk of observed patients. MethodBy carrying out the quality control circle, it was done that confirming the subject, grasping the risk of observed patients, setting a goal, analyzing the risk factors of existing problems, finding out the real reasons, drawing up and actualizing the countermeasures. ResultsAfter carrying out the quality control circle, the main risk factor, emergency rescue, of observed patients was ameliorated significantly (P < 0.05). The risk was declined from 0.41% to 0.14% (P < 0.05). The self-evaluation of circle members was improved (P < 0.001). ConclusionBy the quality control circle, it is actualized effectively that reducing the risk of observed patients and improving the overall qualities of nurses. This thing is helpful to improve the quality of nursing.