Abstract: This paper described a mobile monitoring and inquiry system using the fingerprint biometrics and Short Message Service (SMS) technology. It was specifically developed for the monitoring of preschoolers’ attendance during their schooling, which is beneficial to the working parents. The system adopted the Rational Unified Process (RUP), Visual C#.Net 2008 and MySQL Server 5.1 database and software development kit (SDK). The system was designed to automatically sends an alert SMS to the parents/guardians whenever the pupils logged-in/logged-out in the system.