Meteorological Data Play a Particularly Important Role In Hydrologic Research Because the Climate and Weather of an Area Exert a Profound Influence on Most Hydrologic Processes. Meanwhile, Hydrological Data Are Critical For Performing a Range of Purposes, Including Water Resources Assessment, Impacts of Climate Change, Flood Forecasting and Warning. It Can Be Said That the Prevention of Disasters Caused By Floods and Droughts Would Be Impossible Without Rational Forecasting Technology Based on an Understanding of the Rainfall-Runoff Phenomenon and Statistical Analysis of Past Hydrological Data, Which Cannot Be Achieved Without Meteo-Hydrological Observations. the Lack of Adequate Meteo-Hydrological Data Affects the Ability to Model, Predict and Plan For Catastrophic Events Such As Floods and Droughts Which Have Obvious Negative Impacts on Public Health and Socio-Economic Aspects. the Accurate Estimation of the Spatial Distribution of Meteo-Hydrological Parameters Requires a Dense Network of Instruments, Which Entails Large Installation and Operational Costs. It Is Thus Necessary to Optimize the Number and Location of Meteo-Hydrological Stations Which Gives Greater Accuracy of Meteo-Hydrological Data Estimation With Minimum Cost.