Fisheye Lens Based Proactive User Interface for Wireless Mobile Devices [FLBPUI] is a technique to proactively alert and interact with users according to scenarios/situations particularly by sensing the environmental in all possible direction. FLBPUI works without expecting user input to start interacting with users similar to how we humans look, sense and proactively interact with other people. When user needs to be alerted regarding unattended parameters comprising missed calls, messages, mails, calendar the sensor system starts scanning for environmental users. Sensor system generates trigger signal by scanning environmental users/objects through visual/infrared sensing, face/body recognition, sensing property, direction, dimension, range, orientation, location with respect to mobile device, usage scenarios, and operating modes. Processing unit computes alerting signal based nature of trigger signal and comparing it with predetermined and tested correlation table parameters. FLBPUI utilizes display, mic, voice alert/command, gesture, speaker and lighting devices to alert and further interact with the users.