Dictionary has many functions,in which the function of definition is of very importance because the main purpose of dictionary is providing the entry's meaning information for the readers so that the readers can understand and use the entry-word and the realization of the purpose completely depends on lexicographical definition.However,the function of definition is limited,which need the exemplification to assist it.Therefore,the exemplification becomes very important,too.Good exemplification can assist definition,provide grammatical information,and supplement the information usage and so on.Many researches studied the exemplification of dictionary,its principles and so on.Dictionary changed much with the development of technology and many kinds of electronic dictionaries appeared.Few studies are involved with the new-type dictionary.Based on the general principles of the exemplification in a learner's printed dictionary,it is necessary to construct the general principles about the exemplification in the electronic learner's dictionary.