Wedding Organizer is a service that provide services of organizing all the activities relating to the need in a marriage. This business appears because of the opportunities of modern life who want speed, convenience and practicality separately troubleshooting time deficiency urban communities. This research is motivated by the many people who use the wedding organizer to hold the wedding. Therefore, this study tried to see how the service system in UD.Santoso wedding organizer, is already in line with the Business Ethics Islam or not. From this background, the issues to be addressed is how the service system in UD.Santoso wedding organizer as well as whether the service system implemented by UD.Santoso it is in conformity with the Business Ethics Islam or not. The theory used in this study is one of them according to the "Sinambela" which explains what is meant by the service and also by "Napitupulu". Meanwhile, to collect data by interview and secondary data such as internet assistance and journals. The results of this study indicate that the service system which has been run by this UD.Santoso uses the principle of honest and open. This means that between the service provider and tenant services no shift that caused one of the injured party. On the other hand, in terms of Islamic Business Ethics, service system implemented by the UD.Santoso is in conformity with the principles of Islamic Business Ethics.