Based on the data acquired at the water quality automatic monitoring station in the Jiaozhou Bay in 2016, the variation trend and the standard exceeding status of the water quality are analyzed and evaluated. The results show that during the period from April to November in 2016 the daily means of pH and and dissolved oxygen all reached to the class II seawater quality standard, with the rate of reaching standard being 100%. The annual mean of DIP and DIN was 0.023 mg/L and 0.154 mg/L, respectively, of which DIN was dominated by NO₃N (making up to 64.9%). The standard exceeding days of DIN and DIP were both 16.7% and were mainly concentrated between August and September, when the rainfall was relatively heavy. The exceeding standard of the nutrient salt indexes was basically related to the input of fresh water from the Haibohe River. Chlorophyll a showed a significant positive correlation with dissolved oxygen, pH and turbidity, indicating that phytoplankton photosynthesis had a significant impact on the water quality parameters of the surface seawater in the study area. The nutrients obtained by the automatic monitoring station had a consistent trend in interannual variations with those obtained by manual monitoring, indicating that the variation trend of the nutrients monitored by using the water quality automatic monitoring station could be credible.