1. Count the number of people: after the health education lecture, it is necessary to count the number of people attending the lecture, which can be done by means of sign-in form, registration form, tickets, etc.

2. Record data: use tables or spreadsheets to record the number of people, including the date, time, place, theme, number of participants and other information of the lecture.

3. Count the total number of people: within a period of time, you can add up the number of participants in each health education lecture to get the total number.

4. Data analysis: By analyzing the recorded data, we can understand the characteristics and participation of people attending health education lectures, so as to provide reference for the planning and publicity of the next lecture.