The main aim of the project is to design a MEMS based system using which fall detection can be done and to protect them by alerting doctor through GSM modem. Micro electromechanical systems (MEMS) (also written as micro-electro-mechanical, Micro Electro Mechanical or microelectronic and micro electromechanical systems) is the technology of very small mechanical devices driven by electricity and it merges at the nano scale into nano electromechanical systems (NEMS) and nanotechnology. MEMS are separate and distinct from the hypothetical vision of molecular nanotechnology or molecular electronics. MEMS are made up of components between 1 to 100 micro meters in size (i.e. 0.001 to 0.1 mm) and MEMS devices generally range in size from 20 micro meters (20 millionths of a meter) to a millimeter. They usually consist of a central unit that processes data, the microprocessor and several components that interact with the outside such as micro sensors. In this project MEMS connected to ADC and it gives ADC values. We use MCP3202 as ADC and gives values to microcontroller. The project will be designed in such a way that the microcontroller will be interfaced to MEMS. This MEMS will be tagged to the hand of user (elderly person). If the hand tilts, MEMS will recognize the mechanical hand movements, and will convert these mechanical hand movements into equivalent electrical signals and will send to the microcontroller. The microcontroller receives these signals and immediately alerts its surroundings through the buzzer indicating that the person is fallen. And a GSM modem will also be interfaced to the controller through a line driver IC MAX232 to send the predefined message to the doctor in the case of fall detection, so that the person can be given the treatment as early as possible. This project uses regulated 5V, 500mA power supply. 7805 three terminal voltage regulator is used for voltage regulation. Full wave bridge rectifier is used to rectify the ac output of secondary of 230/12V step down transformer.