Driving warning method and vehicle-mounted device

A vehicle-mounted device comprising:

• a storage device;
• at least one processor;
• and
• the storage device storing one or more programs, which when executed by the at least one processor, cause the at least one processor to:
• detect a moving object and a moving direction of the moving object by using at least one external sensor when a vehicle is moving;
• monitor a driving behavior of a driver of the vehicle by using at least one internal sensor when the moving object and the moving direction of the moving object are detected, wherein the driving behavior of the driver comprises a sight direction of the driver;
• and
• transmit a first warning when the moving direction of the moving object is not parallel to a moving direction of the vehicle and the sight direction of the driver does not cross the moving direction of the moving object,
• determine whether the vehicle and the moving object are in a same lane according to a determining result of whether an angle of an azimuth of the moving object is within a preset angle range.