A contactor and a contactor system are provided. The contactor comprises: a fixed contact; a movable contact capable of moving towards or away from the fixed contact; two arc ignition sheets for the movable contact, being positioned respectively at two sides opposite to each other of the movable contact in a first direction and fixed and electrically connected to the movable contact; two arc ignition sheets for the fixed contact, being positioned respectively at two sides opposite to each other of the fixed contact in the first direction and fixed and electrically connected to the fixed contact; and two arc-extinguishing chambers being arranged respectively on extension lines extending from the movable contact to the two arc ignition sheets for the movable contact in the first direction, wherein the two arc ignition sheets for the movable contact form an incomplete encirclement for the movable contact.