The present disclosure discloses a toothbrush base and a toothbrushing monitoring system. The toothbrush base is suitable for connecting to a toothbrush for monitoring a toothbrushing process of a user. And the toothbrush base further provides analytical data for an external terminal device. The toothbrushing monitoring system includes the toothbrush base. A technical solution adopted in the present disclosure is: a toothbrush base, suitable for connecting to a toothbrush for collecting data during a toothbrushing process of a user. The toothbrush base comprises a housing. The housing is provided with a connecting end connected to an external toothbrush. The toothbrush base further comprises a toothbrushing monitoring device in the housing. The toothbrushing monitoring device is configured for collecting toothbrushing process data.