The　China　Seismo-Electromagnetic　Satellite　(CSES),　with　a　sun-synchronous　orbit　at　507　km　altitude,　was　launched　on　2　February　2018　to　investigate　pre-earthquake　ionospheric　anomalies　(PEIAs)　and　ionospheric　space　weather.　The　CSES　probes　manifest　longitudinal　features　of　four-peak　plasma　density　and　three　plasma　depletions　in　the　equatorial/low-latitudes　as　well　as　mid-latitude　troughs.　CSES　plasma　and　the　total　electron　content　(TEC)　of　the　global　ionosphere　map　(GIM)　are　used　to　study　PEIAs　associated　with　a　destructive　M7.0　earthquake　and　its　followed　M6.5　and　M6.3/M6.9　earthquakes　in　Lombok,　Indonesia,　on　5,　17,　and　19　August　2018,　respectively,　as　well　as　to　examine　ionospheric　disturbances　induced　by　an　intense　storm　with　the　Dst　index　of　-　175　nT　on　26　August　2018.　Anomalous　increases　(decreases)　in　the　GIM　TEC　and　CSES　plasma　density　(temperature)　frequently　appear　specifically　over　the　epicenter　days　1-5　before　the　M7.0　earthquake　and　followed　earthquakes,　when　the　geomagnetic　conditions　of　these　PEIA　periods　are　relatively　quiet,　Dst:　-　37　to　19　nT.　In　contrast,　TEC　and　CSES　plasma　parameter　anomalies　occur　globally　in　the　southern　hemisphere　during　the　storm　days　of　26-28　August　2018.　The　CSES　ion　velocity　shows　that　the　electric　fields　of　PEIAs　associated　with　the　M7.0　earthquake　are　0.21/0.06　mV/m　eastward　and　0.11/0.10　mV/m　downward　at　post-midnight/post-noon　on　1-3　August　2018,　while　the　penetration　electric　fields　during　the　storm　periods　of　26-28　August　2018　are　0.17/0.45　mV/m　westward/downward　at　post-midnight　of　02:00　LT　and　0.26/0.26　mV/m　eastward/upward　at　post-noon　of　14:00　LT.　Spatial　analyses　on　CSES　plasma　discriminate　PEIAs　from　global　effects　and　locate　the　epicenter　of　possible　forthcoming　large　earthquakes.　CSES　ion　velocities　are　useful　to　derive　PEIA-　and　storm-related　electric　fields　in　the　ionosphere.　Spatial　analyses　are　essential　to　find　pre-earthquake　ionospheric　anomalies　(PEIAs).PEIA-related　electric　fields　can　be　estimated　by　using　the　ion　velocity　in　the　ionosphere.China　seismo-electromagnetic　satellite　is　used　to　detect　PEIAs　and　study　ionospheric　space　weather.