The regional test of maize varieties was an important link in the breeding and promotion of superior varieties, test identification results could provide detailed scientific basis for the certification and approval of maize varieties.At present,with the acceleration of the selection and breeding process of new maize varieties,a large number of new varieties passed the national and provincial certification each year,and the number of varieties tested increased year by year, leading to the working amount of test data acquisition became larger. However, the traditional data collection methods for phenotypic traits were backward,recording data taken time and effort,and data management standards were not standard,which couldn’t meet the actual needs of regional test production and management informatization of maize.A data acquisition system of maize phenotypic traits was constructed,which realized the rapid collection of maize phenotypic traits data and provided reference for the rapid acquisition of phenotypic traits information of other crops.The test results showed that,compared with manual recording method,the data acquisition system of maize phenotypic traits hand-held terminal APP could save time 70.8%,eliminated the process of photograph,data entry,professional rename,and improved the efficiency of data acquisition.The system had the characteristics of simple deployment,convenient operation,strong practicability,flexible setting and friendly interface,which could be extended to other types of crops and has a good application prospect.