The invention relates to a system for carrying out a surgery operation. The system includes a bronchoscope, a monitoring device coupled to the bronchoscope, a tracker, a locating component and a biopsy instrument. The biopsy instrument includes a long and thin soft body extending from the near ends to the distal end and a biopsy component formed at the distal end of the long and thin soft body. The biopsy component includes a tissue receiving part having a limited opening. The opening includes a distal-end zone having a big opening. The big opening gradually shrinks towards the near end to form a long narrow opening. The long narrow opening can catch tissues and tear out the tissues. The biopsy instrument is also provided.