Objective To develop the Care Needs Assessment Scale for Patients with Alzheimer disease， and to test it for reliability and validity. Methods Based on literature review， clinical practice， in-depth interview and 2 rounds of expert letter consultation， the initial scale was constructed. Using the convenient sampling method， 150 AD patients diagnosed in the memory clinic of Chongqing Mental Health Center from October 2020 to March 2021 were selected for pre investigation， and items were screened through item analysis and exploratory factor analysis to form a formal scale. Using the convenient sampling method， 105 AD patients diagnosed in the memory clinic of Chongqing Mental Health Center from May to July 2021 were selected for a formal survey. SPSS 25.0 statistical software and AMOS software were used for reliability test and confirmatory factor analysis of the formal scale. Results The Care Needs Assessment Scale for Patients with Alzheimer disease included 4 dimensions （daily care needs， medical care needs， rehabilitation training needs， and psychosocial needs）， 16 entries in total， and the total variance variation of explanation was 76.074%. Confirmative factor analysis showed χ2 /df=2.043， RMSEA=0.100， TLI=0.907， CFI=0.924. The Cronbach's α coefficient of the general scale was 0.902， and the split half reliability was 0.633. The Cronbach's α coefficient of each dimension was 0.736-0.952， and the split half reliability was from 0.739-0.931. Conclusions The Care Needs Assessment Scale of Patients with Alzheimer disease has good reliability and validity， and can be used as a measuring tool to assess the care needs of Alzheimer's disease patients.