The invention discloses a magnetic field measurement method and device based on solid state spin and a magnetic field measurement system. The magnetic field measurement method comprises the steps of modulating a to-be-tested magnetic field so as to turn the to-be-tested magnetic field into a modulated magnetic field, wherein modulation comprises steps of gathering the to-be-tested magnetic field so as to amplify magnetic induction intensity of the to-be-tested magnetic field, and/or modulating the to-be-tested magnetic field to a preset frequency band; and measuring the modulated magnetic field by using a magnetic sensor based on solid state spin. According to the magnetic field measurement method based on solid state pin, the to-be-tested magnetic field is gathered so that the magnetic induction intensity of the to-be-tested magnetic field is amplified, and/or the to-be-tested magnetic field is modulated to the preset frequency band, then the modulated magnetic field is measured by using the magnetic sensor based on solid state spin, therefore, the magnetic sensor based on solid state spin measures the magnetic field more sensitively.