This project is aimed to design an effective parameter monitoring system using serial communication and analog to digital converters based on GSM technology. In industries, there will be various machinery to be operated on the basis of the status of other machinery. For this purpose, a person should be employed to monitor the status of loads. But there may be chances that the person may forget to operate. And also it is not an easy task for a person to operate manually as these machines run with high currents and high power consumption. This project gives the best solution for those situations and also the manual operation will be completely eliminated. This application will be developed by using a wireless concept. Here we consider, one of the wireless communication systems, that is GSM communication system as it is very cheap and very easy to implement. A GSM modem provides the communication interface. It transports device protocols transparently over the network through a serial interface. A GSM modem is a wireless modem that works with a GSM wireless network. This GSM Modem can accept any GSM network operator SIM card and act just like a mobile phone with its own unique phone number. Advantage of using this modem will be that you can use its RS232 port to communicate and develop embedded applications. Applications like SMS Control, data transfer, remote control and logging can be developed easily. The modem can either be connected to PC serial port directly or to any microcontroller. In this parameter monitoring system we will monitor temperature and boiler level in any industry. This project is designed in such a way that we will interface a temperature sensor and three water level sensors to an 8 bit microcontroller. A GSM modem will be interfaced to the controller using serial communication. Three water level sensors will be arranged at 3 different levels of boiler and the temperature sensor will be interfaced to the controller through an ADC to convert the analog value sensed into the digital value. . The microcontroller continuously monitors the output of the temperature and water level sensors. If any of the sensors trigger, the microcontroller can detect this and immediately sends the data or status of the sensors as a message to the user mobile through GSM modem. By this way we can monitor parameters in industries. A 16X2 LCD will be interfaced to the controller to display the status of the sensors. This project uses regulated 5V, 500mA power supply. 7805 three terminal voltage regulator is used for voltage regulation. Bridge type full wave rectifier is used to rectify the ac output of secondary of 230/12V step down transformer.