The overwhelming issue of narcotic cases in courts and prisons has not decreased. This reflects Thailandûs failure to fight the narcotic problems in the past consecutive years. When the parliament approved the Narcotic Code, Thai people expected that this code would mitigate the number of narcotic cases and provide them with more security of society. This article will analyze the criminal concepts and theories and point out that the provision of the Narcotic Code is not synchronized with the punishment theories to aid crime prevention. The principles of criminology assist in preventing criminals from profiting from their crimes. They also act as a safety measure to prevent recidivism. In addition, this article will analyze the problem of the Narcotic Code. A legislature has imposed a new law that penalizes the offenders regardless of the quantity of drugs involved with. These issues cause difficulties for the court to sentence the defendant. It becomes more difficult to prevent the crime, when the court sentences the offender without appropriate law, procedure, and reasons to determine the punishment. By neglecting the defendantûs circumstance, a judgement would be based on the sentencing guideline instead. If the defendants confess to their crime, the court can reduce the sentencing term by half. There are limitations for enforcing the safety measures to prevent recidivism and the proper execution of sentences of imprisonment. I would strongly recommend lawmakers in Thailand to study and conduct research on European countries which have similar legal system to Thailand, a civil law. European countries also have great success in dealing with the narcotic problems. We can study the European law as a guideline for future amendments towards the Thai Narcotics law.