Conservation on architecture plays very important role in shaping the identity or memory of a place as well as presenting its current context. There are must be three strategies consisting in conservation, those are: continuity, development, and usage. Continuity shows the establishment on the tradition for the sake of the continuity on the building identity in the present and future time. Development is a process of changing and adjusting toward  the current of a building to gain the best condition. Usage is creating the use or giving the facility for the existance sustainability of old, present, and future building. Through the tracing on two architure cases, Masjid Sunan Ampel and Masjid Jami’ Malang, this paper aims to explore the character of architecture identity of mosque in Indonesia as an alternative of architecture sustainability which is relevant to Indonesian context, and to the development of technology as one of the instrument to build. The initial stage is exploring the architec of two mosques by using three conservation strategies as the reading tool. The next stage is doing an interpretaive analysis by comparing the finding character identity both mosques’ identity in dialogic way. The above study presents thetwo character of Indonesain mosques’ achitecture which includes technology in the building process. These characters have been becoming the  starting planning strategy of mosque’s architecture which orientates to Indonesian context as well as creatively and innovatively.