In a survey of drug abuse of fourteen types of drugs by employees of public house, the results are follows. $87.4\%$ of male and $82.1\%$ of female ever smoked in his/her life time. $82.2\%$ of male and $75.2\%$ of female smoked in the past month. $90.4\%$ of male and $93.9\%$ of female ever drank in his/her life time. $82.2\%$ of male and $81.6\%$ of female in the past month. $57.8\%$ of male and $54.9\%$ of female smoked daily and $27.4\%$ of male and $53.6\%$ of female drank daily. $3.9\%$ of the employees of public house ever used marijuana in his/her life time: $1.7\%$, stimulants : $5.6\%$ inhalants : $10.0\%$ tranquilizers: $14.6\%$, hypnotics : $32.9\%$ analgesics: $3.7\%$, antitussives: and $1.4\%$, antihistamines; $1.5\%$, cocaine; $0.0\%$ amphetamines; $0.6\%$ narcotics: and $4.71\%$, hallucinogens. Drug use and delinquency showed a dosed relationship: drug users committed higher degree of delinquent behaviors and delinquents used drugs more frequently.