IPSS includes transplantation Parathyroid Scores and in situ Parathyroid Scores, the investigators will establish the Intraoperative Parathyroid Scores System by parathyroid size and Blood supply, and recording IPSS, according to certain rules. Parathyroid hormone and calcium were test in d0, d1, d14, d60 post operation. The correlation between Intraoperative Parathyroid Scores and PTH calcium were calculated, and ROC curve and logistic regression were tested for the prediction value.