This research aimed to investigate perception attitude and behavior ofRajamangala University of Technology Phra Nakhon undergraduate students on 3Dpolicy - based activity Participation and the relations among perception attitude and behavior. 3D aspects include Decency Democracy and Drug-free. The data werecollected through 400 RMUTP undergraduate students from nine faculties in 2010.Data analysis employed frequency percentage mean ( ) standard deviation (s.d.).Statistics used for hypothesis testing included t-Test; to compare between two variables F-Test and One-way ANOVA; to compare more than two variables and Pearson Product Moment Correlation Coefficient. The results of study found that RMUTP students perceived news releases on 3 D policy of the university at the average level. In the meantime their overall attitude towards 3D policy campaign was rated in average level. The attitude towards Decency was at high level and Democracy and Drug-free were considered average. The student participation in 3D –based activities was rated at high level when considered by individual and overall aspect. Hypothesis testing resulted as follows: 1. Students with different gender had different perception of 3D policy with a statistical significance at .05. However there were no significant differences at .05 among students from different faculty. 2. Students with different gender and faculty had different attitude towards 3D policy with a statistical significance at .05 3. The participation behavior on 3D-based activities of students with different gender and faculty was different. 4. The perception of 3D policy new releases had a positive correlation with 3D- based activities participation behavior. 5. Attitude towards 3D policy of the university had a positive correlation with 3D- based activities participation behavior.

The purpose of this research is to study the needs of information about Rajamangala University of Technology Phra Nakhon among Bangkok Metropolitan Area. It employs the quantitative research method using a questionnaire survey with the stratified sampling technique to collect 400 samples from the population of Bangkok Metropolitan Area. The statistics used for data analysis include frequency percentage standard deviation (SD) t-test of independence for two sample groups and one-way ANOVA for comparisons of more than two sample groups. The research findings are as follows: 1. Most respondents are female between 18-22 years of age with the average monthly income of 5000-10000 baht. Their highest education level is a bachelors degree and most of them are students. They averagely have a very high level of needs of information about Rajamangala University of Technology Phra Nakhon particularly about the universitys progression change and reputation through its own website as well as other relevent agencies websites at most. The reason for their information exposure is to help them decide about applying for a degree course a training and other activities held by the university. 2. Hypothesis testing results show that respondents with different ages average monthly income levels and occupations siginificantly have different level of needs of information about Rajamangala University of Technology Phra Nakhon