The student’s perception is a crucial thing in the teaching and learning process. This study aimed to know the students’ perception of the use U-dictionary after school facilitating U-dictionary to make an easy learning and teaching on writing English Languange. The researcher applied descriptive research with a quantitative approach to analyze the students’ perceptions and reaction. The data collection technique used was a questionnaire and the data analysis technique used was descriptive statistical analysis using SPSS 16. The findings showed that students’ perception of positif and negative U-dictionary as seen from 100 respondents, Which the result of positive questionnaire statement is about 70.25%. In contrast, negative questionnaire statement only gets 58.5%. Thus, Some students from SMP 18 think that the U-dictionary is a tool that makes it easier for them to learn to write simple sentence in English, however, other students think that the U-dictionary is not recomanded for learning, but the result U-dictionary make learning more easier
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