The invention belongs to the field of 
artificial intelligence technology and particularly discloses an intelligent question-answering 
system for tax consultation service. The 
system comprises a terminal device where an 
Android operating system is installed and a computer; an 
application software program is installed in the terminal, wherein the 
application software comprises a voice conversion module and a question return module; a service 
software system is installed on the computer, wherein the service 
software system comprises a question understanding module and a question retrieval module; when the system operates, the voice conversion module converts 
voice data output by a user into text data, semantic understanding is performed through the question understanding module, the question retrieval module is used for retrieving answers, and a 
processing result is transmitted to the terminal user through the question return module. According to the system, voice recognition, text classification, similarity calculation and other technologies are used comprehensively to form a method for performing text 
similarity matching on an incomplete 
data set in the area of expertise, profound semantic analysis can be performed on questions raised by taxpayers, and meanwhile ceaseless accurate consultation service is provided for 
mass users to meet the actual requirement for tax consultation.