A posture sensing apparatus and posture sensing method are provided. The posture sensing apparatus includes a magnetic object and a first magnetic sensor. The magnetic object and the first magnetic sensor are disposed respectively at two different positions of a user or a wearing object that the user is wearing. The magnetic object emits a magnetic field. The first magnetic sensor senses the magnetic field emitted by the magnetic object to generate a first angle, so as to obtain a posture of the user based on the first angle.
