The main objective of this study is to analyse the early warning system of volcanic disaster management through sustainable livelihoods approach. The early warning system is the most important phase on disaster management as to reduce the risk of hazard during the eruption appear. Active volcano in Indonesia has been spread since it is located in the ring of fire. This study uses sequential mixed methodology, start with qualitative-quantitative methodology. The study area are Mt. Slamet and Mt. Merapi where located in Java island. The first phase of the research uses exploratory qualitative methodology to identify the term of indicators for Sustainability Livelihoods Approach (SLA), hereafter quantitative is to calculate the path of each variable supported to volcanic disaster management. The qualitative approach took 31 key informants spread in two village surround Mt. Slamet and 19 key informants spread in two village surround Mt. Merapi. The sample of quantitative research on Mt. Slamet is 538 respondents and 137 respondents in Mt. Merapi. SLA is supported to the early warning system. Household networking for social capital directly effect to early warning phase both volcanoes. Nevertheless, human capital, natural capital, physical capital and financial capital is indirectly effect to early warning capacities through transformation of process and structure.