Provided are a nasal high-flow oxygen therapy pressure-monitoring system and a monitoring method thereof a pressure measurement apparatus (110) measures the airway pressure in a breathing circuit of a nasal high-flow, and obtains a measurement signal and sends same to a control apparatus (120) (S110). After receiving a first acquisition instruction, the control apparatus (120) receives a measurement signal sent by the pressure measurement apparatus (110), thus obtaining a first measurement signal (S120), and after receiving a second acquisition instruction, receives a measurement signal sent by the pressure measurement apparatus (110), thus obtaining a second measurement signal (S130). The control apparatus (120) performs analog-to-digital conversion of the first measurement signal and the second measurement signal, to obtain first measurement data and second measurement data, respectively (S140), and according to the first measurement data and the second measurement data, calculates and obtains the patient-end airway pressure value and outputs same (S150). By means of measuring the airway pressure in the breathing circuit, the patient-end airway pressure is measured thus pressure monitoring reference is provided to medical care personnel, reducing risk in clinical use.Linvention concerne un système de surveillance de pression doxygénothérapie à débit élevé par voie nasale, ainsi quun procédé de surveillance associé. Un appareil (110) de mesure de pression mesure la pression des voies respiratoires dans un circuit respiratoire dun débit élevé par voie nasale et obtient un signal de mesure quil envoie à un appareil (120) de commande (S110). Après réception dune première instruction dacquisition, lappareil (120) de commande reçoit un signal de mesure envoyé par lappareil (110) de mesure de pression, obtenant ainsi un premier signal de mesure (S120) et, après réception dune seconde instruction dacquisition, reçoit un signal de mesure envoyé par lappareil (110) de mesur
