Extractor and extraction system

An extraction system comprising:

• an extractor including:
• a tubular member;
• a bottom surface member that is attached to a lower opening portion of said tubular member and used to install a filter for an extraction target;
• a plunger that is inserted into said tubular member and can slidably move in a vertical direction in said tubular member, said plunger including an upper opening portion and a lower opening portion;
• and
• a cap that engages with said upper opening portion of said plunger and includes a through hole,
• a tube that engages with said through hole of said cap;
• a valve that controls a flow of hot water in said tube;
• and
• a tank capable of adjusting a temperature,
• wherein in a state in which the extraction target is placed on the filter installed on said bottom surface member attached to said tubular member, hot water in said tank is poured from said through hole of said cap via said tube, and said plunger is then pushed in, thereby extracting an extract liquid from the extraction target.