Multi-card compatible molecular diagnosis system

The invention provides a multi-card compatible molecular diagnosis system, the multi-card compatible molecular diagnosis system comprises a nucleic acid extraction and liquid adding system, a sample adding system, a sample introduction system, a nucleic acid amplification system and a gripper and detection system, the nucleic acid extraction and liquid adding system comprises a molecular detection plate; the sample introduction system comprises a molecule detection card, the molecule detection card comprises a single-step PCR detection card and a nested PCR detection card, and the nested PCR detection card comprises a first liquid suction port, a second liquid suction port, a third liquid suction port and a molecule detection card cavity. The first liquid suction port, the second liquid suction port and the third liquid suction port are respectively connected with the molecular detection card cavity, the nested PCR detection card further comprises a non-deformable card body, and the molecular detection card c