Water Sampling Drone is an automatic surface water sampling system based on the STM32 microcontroller. The improved collection system allows you to manage multiple samplings during a single mission and thanks to a multi-parameter platform (pH, Temperature, Dissolved Oxygen, Conductivity, solid state detector for muon measurement) data on the quality of the water for each withdrawal point. The collected water is then stored in special test tubes and can be used for subsequent chemical-biological analyzes in the laboratory. The system is equipped with a GPS independent from the drone control one to allow the replicability of the sampling and the georeferencing of the data: the coordinates and the acquired data are memorized on a micro-SD and simultaneously sent via radio to a computer on the ground.