Studies were carried out to investigate biological characteristics including the feeding preference, growth and development of two most common clothes pest, the silverfish (Lepisma saccharina) and common clothes moth (Tineola bisselliella) by the effects of temperature and food sources, and to compare the efficacy of their control with vaporthrin, naphthalene, and paradichlorobenzene. The damage of clothes made by L. saccharine, and T. bisselliella were greater on wool than on cocoon and untreated silk. However, T bisseliiella made damage on on wool, cotton and untreated silk in order of magnitude. T. bisselliella showed shorter develop-mental period in 65.4 days from egg to adult emergence at 27$^{circ}C$, while at 17$^{circ}C$, it took 185.7days as much as 3 folds longer. The mortality of the eggs, 1st and 2nd instar larvae of T. bisselliella represented higher at 17$^{circ}C$ by 48.0, 53.8, and 14.3% respectively, however. at 32$^{circ}C$ the mortality was 24.0, 52.6 and 11.1% respectively. The developmental period of T. bisseiliella by 7 different food sources including wool, wool+yeast, fishmeal, fishmeal+yeast, yeast, cotton and silk, showed that T. bisselliella fed on wool+yeast had shorter period for adult emergence of 65.5 days, followed by 73.6 and 67.2 days with fishmeal and fishmeal+yeast, respectively. However the immature of T. bisselliella fed on wool only were continued until 15th larval stage. L. saccharina tested were most susceptible to vaporthrin with ED$_{50}$ 17.74 $mu extrm{g}$, followed by paradichlorobenzene (44.34 $mu extrm{g}$), naphthalene least susceptible with ED$_{50}$ of 155.55 $mu extrm{g}$; test results showed vaporthrin was 2.5 and 8.8 folds more susceptible than that of the other 2 chemicals respectively. The residual effect of vaporthrin was produced 20% mortality against 1. saccharine for 20 weeks periods, in cagetests. T. biss-eliieiia tested were also most susceptible to vaporthrin with ED$_{50}$ 229.69 $mu extrm{g}$ followed by paradichlorobenzene (26, 413.76 $mu extrm{g}$) and naphthalene was not susceptible with more than 1g. The residual effect of vaporthrin was produced 90% mortality against T. bisseiliella for 16 weeks periods, in cage-tests. The respiratory toxicity and the contact toxicity by vaporthrin were confirmed.