Objective To analyze the items and psychometric properties of assessment for development and adaptive behavior. Methods The standardized assessments commonly used in evaluation of children development and adaptive behavior were selected such as Pediatric Evaluation of Disability Inventory-Computer Adaptive Test(PEDI-CAT),Vine-land Adaptive Behavior Scales(VABS-Ⅱ),Adaptive Behavior Assessment System(ABAS-Ⅲ),Bayley Scales of Infant and Toddler Development(Bayley-Ⅲ)and Diagnostic Adaptive Behavior Scale(DABS).Using the ICF's classification framework,linking rules and coding methods,this study conducted a content analysis of the mea-surement dimensions and items of the five assessments,and explored the psychometric properties. Results PEDI-CAT items covered ICF categories such as washing oneself(d510),caring for body parts(d520),toileting(d530),eating(d550),drinking(d560),looking after one's health(d570),basic interpersonal interactions(d710),complex interpersonal interactions(d720),changing basic body position(d410),maintaining body position(d415),and fine hand use(d440),among others.VABS-Ⅱ items covered speaking(d330),conversation(d350),washing oneself(d510),caring for body parts(d520),using transportation(d470),acquisition of goods and ser-vices(d620),basic interpersonal interactions(d710),complex interpersonal interactions(d720),changing body position(d410),and maintaining body position(d415).ABAS-Ⅲ items covered speaking(d330),communicating with-receiving-nonverbal messages(d315),reading(d166),recreation and leisure(d920),community life(d910),handling stress and other psychological demands(d240),looking after one's health(d570),and acquiring,keep-ing and terminating a job(d845).Bayley-Ⅲ items covered memory functions(b144),thought functions(b160),speaking(d330),fine hand use(d440),walking(d450),basic interpersonal interactions(d710),carrying out daily routine(d230),and recreation and leisure(d920).DABS items covered higher-level cognitive functions(b164),reading(d166),basic economic transactions(d860),basic interpersonal interactions(d710),solving problems(d175),handling stress and other psychological demands(d240),carrying out daily routine(d230),and using transportation(d470).All the five assessments were norm-referenced measures.PEDI-CAT had high discrimina-tive validity and reliability,with computer-adaptive testing enabling more precise measurement of children's func-tional levels.VABS-Ⅱ possessed good reliability and validity,with multiple versions for different age and ability levels.ABAS-Ⅲ offered a wide range of adaptive behavior measures with medium to good reliability and validi-ty.Bayley-Ⅲ had excellent internal consistency and test-retest reliability,while DABS showed high validity and reliability indices.The five assessments had high applicability,including norms for different groups and versions for various cultural and language contexts. Conclusion The items of assessments involves multiple ICF categories at the levels of body functions,and activities and participation,mainly focusing on the areas of intellectual functions,high-level cognitive functions,and ability of daily living.All five assessments are norm-referenced and multidimensional,structured assessment tools with strong reliability,validity and applicability.