A physiological sensor controller controls a physiological sensor (or ECG sensor), positioned on a patient body, for measuring physiological information (or ECG waveform) of the patient body to output a measurement signal. An acquisition device acquires a verification image containing portions of identification information of the physiological sensor and a face of the patient body. A verifier performs verification of acceptability in a combination of the physiological sensor and the patient body according to the verification image. A receiver receives the measurement signal. A detector detects normality or abnormality of receptivity of the measurement signal. A checker operates assuming that the detector determines the abnormality of the receptivity, and checks whether a retry for the verification in the verifier is required or not. An output device operates assuming that the checker determines requirement of the retry for the verification, and outputs information of encouraging the retry for the verification.
