A liquid detection system (100) used for detecting the position of the liquid level of liquid in an infusion bottle. The system (100) comprises: an infusion bottle sleeve unit (101) used for determining the overall gravity of an infusion bottle an infusion bottle cover unit (102) used for determining the density of liquid in the infusion bottle a transmission unit (103) used for transmitting the overall gravity of the infusion bottle and the density of the liquid to a server (104) and the server (104) used for determining the gravity of the liquid in the infusion bottle, calculating the volume of the liquid in the infusion bottle according to the gravity of the liquid and the density of the liquid, and determining the position of a liquid level based on the volume of the liquid. The liquid detection system (100) of a medical infusion bottle is integrated in an infusion bottle sleeve and an infusion bottle cover, a parameter of a liquid level in the infusion bottle is detected in real time by means of the infusion bottle sleeve unit (101) and the infusion bottle cover unit (102) and is transmitted to a wireless terminal device (105) in real time, and then data is uploaded to the Internet, so that a user not only can observe the parameter of the liquid level, but also can set an early-warning threshold value so as to perform good real-time interaction with an infusion bottle system.Linvention concerne un système de détection de liquide (100) utilisé pour détecter la position du niveau de liquide dans un flacon de perfusion. Le système (100) comprend : un ensemble manchon pour flacon de perfusion (101) utilisé pour déterminer la gravité totale dun flacon de perfusion un ensemble couvercle pour flacon de perfusion (102) utilisé pour déterminer la densité du liquide dans le flacon de perfusion une unité démission (103) utilisée pour transmettre la gravité totale du flacon de perfusion et la densité du liquide à un serveur (104) et le serveur (104) utilisé pour détermi
