Abstract: Fluid supply, monitoring and control system from LPG supply vehicles to tank trucks, the vehicle has a LPG liquid level gauger, an output line over which it is located in a fluid way a solenoid valve which allows or cuts the LPG flow besides of a flowmeter which measures the amount that flows through the said output line, a fluid coupled hose to the said output line with a connector which allows to safely couple to a stationary tank; the system also includes the use of a mobile computer device, a central that has at least one desktop computer device connected to a WIFI data network of mobile phone data network with which it communicates with the mobile device.