It depends on who removed the door magnet. If you pick it yourself, if the staff picks it after the quarantine expires, it means you can go out, but whether you can go out to work depends on the local epidemic prevention policy, because in some places, you have to carry out self-health monitoring for several days after being quarantined at home for seven days, so you can go out to work if there is no problem.
Door magnetic system is a kind of safety alarm system, which is not easy to see if you don't pay attention. The so-called door magnetic switch is actually composed of two parts: the smaller part is a permanent magnet with a constant magnetic field inside, and the larger part is a door magnetic body with a normally open reed switch inside. When the permanent magnet is close to the reed switch (less than 5 mm), the door magnetic sensor is in a waiting state, and when the permanent magnet is away from the reed switch for a certain distance, it is in a normally open state.