Mystery customer projects vary a lot, and it seems difficult to classify them effectively. However, in order to facilitate comparison and analysis, it is necessary to classify them appropriately according to some standards, although such classification seems meaningless in the implementation of specific projects. According to the relative experience depth of the role played by the mysterious customer relative to the real role, a market research company divides the mysterious customer's visit into the following forms for reference: 1, full experience of actual users: it refers to the mysterious customer's visit mode that can experience the whole service process personally. This method needs high cost, but it is the least difficult to realize, the least easy to be found and the largest amount of information to be mined. In other words, such a mysterious customer is actually a real consumer. Generally speaking, this method is widely used in the monitoring of some restaurants, and the aforementioned "mysterious customer on-site procurement" is also one of them. Whether the project adopts this method depends on the trade-off between the value of the required information and the implementation cost. 2. Actual user experience: As a person with real consumer demand, it is a mysterious customer visiting mode to experience and test the key links or key research links in the whole service process. Relatively speaking, the cost of this method is lower than the first one, and the amount of information mined is larger, but the operation difficulty will increase a lot. In other words, such mysterious customers can be said to be real consumers who are partially involved. 3. Full experience of potential users: This acquisition method is mainly based on information exchange and interaction with the tested person, supplemented by the actual service experience, and collecting information involves the whole process of real purchase behavior. It pays more attention to the service attitude of the respondents and their mastery of business knowledge. This operation mode has poor concealment, is easy to arouse the suspicion of the detected object, is difficult, and requires high skills for mysterious customers to visit the implementers. 4. Partial experience of potential users: Compared with the complete experience of potential users, the main difference of partial experience of potential users is that the information collected is concentrated on some services, not the whole service. 5. Invisible man mode: This is a mysterious customer access mode that only uses observation method. Mysterious customers do not participate in or affect the implementation of the service process, but only observe and record the actual service process of the detected object. Therefore, the best state of this model is that mysterious customers should be able to exist as air without being detected, and be recorded as real and objective as a camera lens. It can also be divided according to the tasks undertaken by mysterious customers, because the instructions and tasks received by mysterious customers before monitoring will have different purposes, which can be divided into clear task type, semi-clear task type and unclear task type. The definition of task-based mystery customer visit means that through project design, with complete detection indicators and detailed record forms, visitors who perform tasks can complete the investigation of the project according to the predetermined plan. For some mysterious customer projects that require strict service evaluation and rewards and punishments, this method is generally adopted. The advantages are strict organization and index system, which can maximize the fairness of test results and reduce the influence of human factors; The disadvantage is rigidity, which limits the subjective exertion of the interviewer and is not conducive to finding deeper or more difficult problems. Semi-clear task-based mysterious customer visit refers to the fact that most of the survey indicators are clear and systematic, and there are relatively perfect interview questionnaires and records. The interviewer should strictly complete these established contents in the execution. In addition, there are some open projects, which may be brought to the attention of the interviewer by researchers and experts in advance, or may be accidentally discovered or encountered by the interviewer in his personal experience. These are also an important part of the results of this mysterious customer visit. This form not only ensures the systematic fairness of indicators, but also makes the acquisition more flexible and practical. The disadvantage is that the interviewer's ability is different and the experience is accidental, so he may not be able to find universal problems, which requires in-depth analysis by later researchers. Mysterious customer visits with unclear tasks mean that the interviewer only carries out basic training before performing the tasks, and the assigned tasks are relatively simple, and there is basically no designed questionnaire form. When performing the task, the interviewer handles it flexibly according to his own experience, and replies all the questions he has executed and found to the researcher. This method is rarely used in the commercial field of globrand.com, and it is also very difficult, especially in the later data processing and analysis. But in some specific occasions, in order to avoid personal feelings, or to avoid the interviewer wearing colored eyes to see people, you can also use it. As we mentioned earlier, Mao Zedong asked his guards to check the situation at the Central Party School without disclosing his purpose in advance, so as to ensure the fairness of the recycling results. Like other market survey visits, mysterious customer visits can be classified according to different survey methods, such as truthful mysterious customer visits, mysterious telephone visits and mysterious online surveys. In the field of mystery customer detection, an interviewer is assigned to the service site for on-the-spot experience, and the actual shopping experience and the observation of the service scene are recorded. Mysterious telephone surveys are generally conducted by dialing a hidden number in the center or pretending to be an obscure area and accent. Mysterious online investigation is a way to investigate and collect information with the help of the network. The classified study of mysterious customer visits can enhance the pertinence of our implementation and contribute to the study of mysterious customer theory. In fact, there are still many angles for us to explore.