The paper introduces a Real Time monitoring Automatic analysis and Neutralization of HNO3 in Acid Storage and Treatment Plant (ASTP). This system aims to reduce the variability and processing time involved in manual neutralization while maintaining comparable results. The used acids like HNO , HF are acidic that causes environment hazards so it 3 should be treated properly. The conventional method employs sampling the acid for pH measure and then manually neutralizes it. This system proposes pH monitoring at running condition and neutralizing with lime automatically so as to maintain pH level at 6.5 to 8.0. and also the whole plant with various parameters like lime milk level, pressure, temperature, flow of acid will be monitored integrally and automatically by the implementation of PLC.