The invention relates to a robot in the sewage treatment field. The robot comprises a command emitting device and a dosing robot. The command emitting device is installed on the medicament pipeline ofa sewage facility. The command emitting device comprises a sensor and a sensing information processing and emitting system. The sensor is used to sense and receive medicament information and then sends the medicament information to the sensing information processing and emitting system in real time. The dosing robot comprises a head unit, a medicament chamber, and a driving system. The driving system is connected to a cable channel and thus the walking becomes convenient. The head unit is arranged under the driving system, and the medicament chamber is arranged under the head unit. The head unit can intelligently control the medicament chamber and the driving system so as to meet the requirements and carry out precise dosing. The sewage treatment parameters can be executed precisely. Theexecution time and cost are reduced. The personnel safety is guaranteed. The robot is widely used in the chemical danger and safety field.