Objective To study the estimated value of general pituitary hormone levels and "overall levels of pituitary hormone" in patients with pituitary adenoma.Methods Sixty-six patients presented with non-function pituitary adenomas,admitted to our hospital from January 2009 and April 2013,were chosen in our study.Pre-and post-operative hormonal levels and MR imaging data were collected.Patients were divided into two groups:macroadenoma (1 cm＜diameter＜3 cm) group and huge adenoma (diameter＞3 cm) group,and the patients were divided into subtotal resection group (resection rate＞60％) and partial resection group (resection rate＜60％).Self-made scale of "overall levels of pituitary hormone" was performed to assess the remnant pituitary function.The levels for 6 kinds of pituitary hormones and "overall levels of pituitary hormone" were compared between each two groups.Results (1) The levels of 6 kinds of pituitary hormones between the macroadenoma group (n=38) and huge adenoma group (n=28) showed no significant difference before surgery (P＞0.05);the per-operative "overall levels of pituitary hormone" were statistically different between the macroadenoma group (19.59±2.71) and huge adenoma group (18.07±2.00,P＜0.055);there were 13 patients (34.2％) from macroadenoma group and 17 (60.7％) from huge adenoma group having one or more kinds of pituitary hormones lower than normal levels,with significant difference (P＜0.05).(2) The levels of 6 kinds of pituitary hormones between subtotal resection group (n=57) and partial resection group (n=9) showed no significant difference after surgery (P＞0.05);the post-operative "overall levels of pituitary hormone" in the subtotal resection group were significantly higher than those in the partial resection group (P＜0.05);there were 34 patients (59.6％) from subtotal resection group and 2 (22.2％) from partial resection group having one or more kinds of pituitary hormones lower than normal levels,without significant difference (P＜0.05).Conclusions The "overall levels of pituitary hormone",in which 6 kinds of pituitary hormones are seen as a whole,can assess the remnant pituitary function in pituitary adenoma patients more accurately than evaluation of the 6 kinds of pituitary hormone levels separately.