Our daily lives are recently very busy and stressful, and our time spending to keep desirable lifestyle is cut down although we know that high quality lifestyle is very important for maintaining the health of both our body and mind. One of reasons that we tend to lead a sloppy lifestyle is that there is no adequate feedback to us about our current behavior, and it is not easy to motivate us to keep desirable lifestyle in stressful everyday lives. These are especially becoming serious social problems in many urban cities. We are demonstrating a couple of persuasive ambient mirrors whose expression evokes our emotion to motivate to change our current undesirable behavior. In the systems, persuasive ambient mirrors represent adequate feedback to reflect our current behavior to boost our positive emotion to motivate desirable lifestyle and change undesirable behavior by evoking our negative emotion. The paper presents two case studies that motivate desirable lifestyle, and extracts some design issues based on the experiences with the case studies.