The property of virtual economy includes rivalry, persistence, interconnectivity, secondary markets and value added by users. Rivalry means that a limit is placed on the number of persons who possess property. Persistence refers to that even when the property is out of use possession is still maintained. Users are expected to leave property in their possession between sessions. The Third is interconnectivity that affects or is affected by other people and other property. The value of property is depending on a person’s ability to use it. Another one is secondary markets which mean to create trade, buy and sell virtual property. The last one is value added by users. Users are able to improve the value of virtual property in the way of customizing the property.