Infertility refers to the incidence of normal sexual intercourse without contraception for one year without pregnancy, and its incidence has been on the rise in recent years. Determining the cause of infertility is the key and the first task in treating infertility. The etiology of infertility is complex, and many infertility patients are unable to find the cause of infertility through routine examination. With the continuous development of endoscopic technology, laparoscopy and hysteroscopy have now become one of the important means to diagnose and treat pelvic lesions and uterine cavity lesions in female infertility. As an effective and minimally invasive gynecological medical technology for diagnosis and treatment of lesions in the uterine cavity, hysteroscopy can observe the morphology of the uterine cavity, the endometrial condition and the opening of the fallopian tubes and other conditions in the uterine cavity under direct vision, which can not only determine the location, size, appearance and scope of the lesions, but also make detailed observation of the tissue structure on the surface of the lesions, and take materials or locate biopsies under direct vision. It is the gold standard for the diagnosis of intrauterine lesions in modern times because it is more intuitive, accurate, reliable, reduces leakage and increases the accuracy rate compared with traditional examination methods. Under hysteroscopy, the morphology of the uterine cavity, the state of the endometrium and the opening of the fallopian tubes are directly observed, and the uterine cavity is also investigated for endometrial polyps, submucosal fibroids, uterine adhesions, longitudinal uterus and other occupying factors affecting embryo implantation. If necessary, we will perform separation of uterine adhesions, submucosal myomectomy, longitudinal hysterectomy, endometrial polyp scraping, etc. to restore the normal shape of the uterine cavity and provide good uterine conditions necessary for embryo implantation. For abnormal uterine bleeding (AUB): such as excessive menstruation, excessive frequency, prolonged menstruation, irregular vaginal bleeding, etc. and abnormal intrauterine imaging, patients with unexplained failure of embryo implantation in IVF-ET cycle, patients with history of failed implantation of transferred high-quality embryos, recurrent miscarriage and unexplained infertility, it is recommended to improve hysteroscopy before assisted reproductive treatment to find the cause and improve clinical pregnancy rate. Laparoscopy is an effective and minimally invasive gynecological medical technique for the diagnosis and treatment of pelvic lesions. It can not only visualize the pelvic cavity, clearly show whether the morphology of the uterus, fallopian tubes and ovaries has changed, whether there are adhesions around them, whether the normal anatomical position has changed and whether there are congenital malformations, etc., but also biopsy under direct vision and obtain evidence of the disease. The biopsy can be performed under direct vision to obtain evidence of the pathology, and the physician can make an accurate assessment and assist in treatment; for the latter, surgery is immediately feasible. At present, laparoscopy has become an important examination tool for female infertility. Laparoscopic release of pelvic adhesions and restoration of normal pelvic anatomy can improve the clinical pregnancy rate and reduce the risk of organ damage due to abnormal pelvic anatomy during IVF retrieval. Laparoscopic tubal lavage is used to determine the patency of the fallopian tubes by pushing the fluid resistance and reflux under direct vision, which helps to exclude pseudo-obstruction of the fallopian tubes caused by tubal spasm and tissue debris obstruction, and to dynamically observe the patency of the fallopian tubes. In addition, while searching for the cause of infertility under laparoscopy, treatment such as tubal umbilical plastic stoma, ovarian cyst debridement and electrocautery of endometriosis lesions can be performed, which is of great significance to improve clinical prognosis. The clinical value of combined hysterolaparoscopy in infertility treatment: Domestic and foreign literature reports that 7-9% of infertility patients have combined endometrial polyps, 4-6% have submucosal fibroids, 12% have longitudinal uterine diaphragm and uterine adhesions, 76.8% have combined pelvic adhesions, and 49.8% have fallopian tube obstruction. The positive diagnosis rate of infertility causes by laparoscopy alone was 64.3%, while the diagnosis rate by combined hysteroscopy was up to 82.6%. Therefore, combined hysterolaparoscopic surgery is of dual significance for functional evaluation and functional restoration in women with tubal infertility. ”The work is to be done, the tool is to be used first”. Hysteroscopic investigation of the uterine cavity and resolution of endometrial polyps, submucosal fibroids, longitudinal uterus and other factors affecting embryo implantation; laparoscopic release of pelvic adhesions and restoration of normal pelvic anatomy, tubal lavage to determine the degree of tubal patency and, if necessary, tubal cisternostomy to improve the pregnancy environment, are conducive to guiding the selection of assisted reproduction protocol and improving clinical prognosis, with half the effort. It is useful in guiding the choice of assisted reproduction protocol and improving the clinical prognosis, with a multiplier effect.