This research aims to study a model of marketing strategic towards generationmillennials customers’ buying decision using food delivery application and to present model of marketing strategic towards generationmillennials customers’ buying decision using food delivery application. The mixed methods approaches of quantitative and qualitative research methods were used. In qualitative research method using in-depth interviews with 11 respondents and quantitative research in which questionnaire was used as an instrument to collect data from 400 populations of generation millennials customer living in Bangkok who order foods through food delivery application. Statistics for data analysis included frequency percentage average standard deviation exploratory factor analysis (EFA) The results indicated that most of the respondents were women with a bachelorsdegree who had a career as private company employees and an average monthly income of 18000 – 25000 bahts use Grab application the most use less than once week there are a total of 2 orders per order choose order the most street food average 100 - 350 Baht cost per time order food in the evening (17.01-22.00 p.m.) order food to eat at accommodation most order food to eat with friends reason for ordering a delivery is that it is comfortable from out going by self choose to pay by cash and consumers think that all of the factors are important in deciding to order food from restaurants through the Delivery Application application at high level. Results analysis of factors affecting generation millennials customers’ decision making to order from food delivery application be classified into eight factor as 1) easy to user experience strategy 2) goods value and price strategy 3) physical evidence and presentation strategy 4) strategies for brand awareness 5) accuracy and complete strategy 6) restaurants management system strategy 7) sales promotion strategy 8) new product development strategy.

The objectives of this quantitative research were 1) to study consumer behavior to select Bangkok restaurants receiving Bib Gourmand awarded by Michelin 2) to compare decision-making to select Bangkok restaurants receiving Bib Gourmand awarded by Michelin classified by demographic characteristics and 3) to study the relationship between service marketing mix factors and the decision-making process affecting the decision to select Bangkok restaurants receiving Bib Gourmand awarded by Michelin. The sample of this study consisted of 400 Thai consumers with at least once experience to use the service of Bangkok restaurants receiving Bib Gourmand awarded by Michelin. A questionnaire was used as a research instrument to collect data. Data collected were analyzed by statistics including frequency percentage mean standard deviation t-test and F-test one-way analysis of variance and the Pearson’s correlation coefficient. The results of this research indicated that most of the respondents were female between 20-30 years worked as a private company employee graduated with a Bachelors degree or equivalent earned an average monthly income of 15000-25000 baht and had a single status. In terms of consumer behavior most of the respondents have known Bib Gourmand by Michelin award. The most popular restaurant was Krua Apsorn (Sam Sen). The average duration of waiting for each service was 11-30 minutes. An influential person for purchase decision was oneself. They used the service for dinner during Saturday – Sunday. The frequency of using the service was about once per month and the average cost per person was 101-400 baht per time. Service marketing mix factors affecting the decision to select Bangkok restaurants receiving Bib ourmand awarded by Michelin for both overall and individual aspects were at a high level. Decision-making process affecting the decision to select Bangkok restaurants receiving Bib Gourmand awarded by Michelin for both overall and individual aspects were at a high level. In terms of comparing demographic characteristics the respondents with different age occupation monthly income and marital status had different decision to select Bangkok restaurants receiving Bib Gourmand awarded by Michelin with a statistical significance level of 0.05. In addition service marketing mix factors were moderately positively related with the decision-making process affecting the decision to select Bangkok restaurants receiving Bib Gourmand awarded by Michelin. When individual aspects were considered six factors including product place promotion people process and physical evidence were moderately related with the decision-making process. However price was related with the decision-making process at a low level.