The main methods for identifying sea breeze days used in sea land breeze researches in the recent 20 years are summarized. These methods are classified as follows depending on the different types of datasets used: (1) conventional data, (2) atmospheric remote sensing data, and (3) the results of numerical simulation. For conventional data, the criteria of determining the establishment of sea breeze days are divided into 6 kinds depending on the main factors which trigger sea land breeze, and each kind is specifically discussed. For the other two categories, some typical methods are discussed in the aspects of their advantages and disadvantages.