This task is aimed to investigate McDonald's customer care services. For the first part, a brief overview on McDonald's background and the client care is provided to add the readers to the primary topic. Since it approaches the middle part, it talks about about actual application of the client care concepts how McDonald's mange it's customer relationships and try to discover the possible actions for improvement its customer service. Topics included are the specific routines and guidelines of McDonald's customer support to its inside and external customers, issues relating to customer service and types of their treatment about the said issues, while others. For the last part, a realization section is added to formally wrap up the discussion. As one of the world's largest string of hamburger junk food restaurant, it's serving nearly 47 million customers daily.