Unbalanced nutritional intake is a crucial health concern for the elderly residing in long-term care facilities. The Department of Oral Health of the Ministry of Health and Welfare has reported that people over the age of 65 generally experience poor oral health. Elderly individuals living in long-term care facilities are particularly susceptible to issues with mastication or swallowing function due to various health conditions. Additionally, long-term care facilities often provide diets that consist of primarily chopped, minced, and liquid foods. This can lead to the elderly neglecting the importance of consuming non-modified food, resulting in an increased risk of malnutrition. This article utilizes real-life cases to evaluate oral cavity and eating conditions. Based on literature reviews, nursing strategies such as texture modified diet and oral function training for the elderly are proposed to enable early detection of oral and eating issues. Appropriate dietary texture guidance is also given to minimize the risk of malnutrition and poor eating habits while improving the overall quality of care for long-term care residents.