In 1981, the famous physicist Feynman first proposed the idea of quantum computing. This idea has achieved rapid development in both theory and experiment for more than 30 years. Theoretical studies have shown that quantum computers based on the principle of quantum superposition may show the advantages that classical computers can't match for specific problems. There are many physical systems for quantum computing in experiments. Compared with microsystems such as optical systems, ion traps and quantum dots, superconducting circuits based on the macro Josephson effect have advantages in terms of maneuverability and scalability. It is one of several physical carriers recognized by the international community to realize quantum computing. In the past five years, Wang Haohua's research group of Zhejiang University's physics department has been working on experimental research on superconducting quantum computing and quantum simulation. Recently, he has made many breakthroughs in this field in cooperation with domestic fraternal units.