This paper is a case study investigating the innovation of Dominino’s Pizza by focusing on digital transformation. In the introduction, the purpose, method, data source, and scope of this case study were presented. In the body, the current status of Domino’s Pizza in quick service restaurant(hereafter QSR) as a representative franchise company such as revenues, sales, and the store numbers in the US and international markets were examined in last 3 years. With the recent status quo, Domino's Pizza actively utilized the digital transformation that it had built in the non-contact environment caused by the COVID-19 outbreak in 2020 and developed and launched new online innovations. As a result, in 2020, Domino’s Pizza accomplished more than 2 times in sales growth per store compared to the previous year in the US market. Domino's Pizza was founded in 1960 by the Monahan brothers, and continued to grow until the mid-2000s in both revenues and sales by expanding the market in the US and overseas through franchise. Domino's Pizza, listed on the New York Stock Exchange in 2004, faced a crisis in the US market since 2006 because consumer complaints about the poor taste of pizza and sales per store continued to decrease for 3 consecutive years. At the end of 2009, Domino's Pizza was able to reverse the situation by launching pizzas with new flavors and new menus and actively marketing them.as innovations. Since then, Domino's Pizza introduced digital transformation in ordering and delivery, and improved, expanded, and added new ones continuously. Domino's Pizza has sequentially increased its sales per store in the US market over the past 10 years by developing innovations in pizza taste and menus and digital transformation in ordering and delivery, and has continued to do so in overseas markets for 27 years. Factors contributing to Domino's Pizza’s success in digital transformation include redefining the its franchise business, building a competitive advantage in the QSR business itself through new pizza and menu innovations, strengthening online capabilities and securing professional IT workforce, continuous improvement, collaboration with external specialized companies such as IT on a long term basis, and customer experience enhancement through consumer engagement. Finally, implications of Domino’s Pizza’s success factors for franchises, limitations and future study directions based on the case study results are discussed and suggested.