Recently through the development of technology, electronic money is becoming a convenient payment system and beginning to enjoying popularity. Electronic money has a lot of advantages over cash. First, electronic money relieves people of the pressure of taking a lot of cash with them, which is more convenient. Second, electronic money will leave a instant record on our account, as a result, helping us keep accounts. However, there are still a large number of people who are used to cash payment, so many people will continue to use cash.