In this study, the authors applied a modified SRF product quality based on a mix of disposable plastic bags and bulky waste to estimate the mixing ratio which can be the energy efficiency of coal for fuel. This study was performed to find physical properties of bulky wasteand element analysis for the mixd disposable plastic bag. Also, SRF (solid recovery fuel) was tested to figure out, physicochemical properties by standard method. As the results, the physical properties of bulky waste shows 89.6% of wood. Then the author measured disposal plastic bag as follows : [3 : 7], [5 : 5], [7 : 3] quality criteria by the mixing ratio of bulky waste. The low calorific value was proportionally increased whenever the mixing ratio of disposable plastic bag was increased. Therefore, the author can surmise that the mixing ratio between bulky waste and disposable plastic bag was [6 : 4]. It shows 5,950 kcal / kg value as much as coal fuel.