This research provides the design and implementation of a web-based software application of Community Health Center/ CHC (Pusat Kesehatan Masyarakat = Puskesmas). The application is mainly used for recording patient's personal identity and medical treatment at medical services (polyclinics) of CHC. Generally, the polyclinics at Puskesmas provides are General Medical Treatment Service (Poli Umum), Maternal and Infant Service (Poli Ibu dan Anak), Dental Service (Poli Gigi), and Drug Service. With the application, all data of patient's personal identity and medical treatment at medical services of Puskesmas are recorded and integrated in an attempt to create an accurate report based on the reporting format standard set by Ministry of Health, Indonesia. Furthermore, on technical side, the application is built up with open source-based technology, so a license is not required to use it. Relational Database Management System, MySQL, Apache web server and PHP are aids software which is operasionalized to initially implement the system. On the other hand, to implement the application a web browser is needed. The application is equipped with user authentication, That is used to ensure that the application is accessed only by appropriate medical personnel. Users categorized in administrator level have a higher authority than the ones categorized as operator. In fact, the application has been implemented at some of CHCs in Depok Municipality. Moreover, the initiative of the application has been developed for infant malnutrition surveilance. Some of the data obtained from Puskesmas are going to be seriously followed up to make effective decisions to take curative actions on infant malnutrition cases.